The Prime Minister of India, at the time of his/her appointment:

1. The Parliamentary System of Government (basic)

To understand the Office of the Prime Minister, we must first understand the stage on which they perform: the Parliamentary System of Government. At its heart, this system is defined by the intimate relationship between the Legislature (those who make laws) and the Executive (those who implement laws). Unlike the Presidential system (like in the USA) where these two branches are strictly separated, the Indian Parliamentary system is based on the principle of cooperation and coordination between them. As highlighted in Exploring Society: India and Beyond, Class VII NCERT, Chapter 6, p.194, in this form of government, the members of the executive are also part of the legislature. This means you cannot usually be a Minister or Prime Minister without also being a Member of Parliament (MP).

The system functions through a Dual Executive structure. We have a Nominal Executive (the President), who acts as the formal Head of State, and a Real Executive (the Prime Minister), who is the actual Head of Government. The Prime Minister leads the Council of Ministers, and together they are collectively responsible to the Lok Sabha. This means the government can only stay in power as long as it enjoys the 'confidence' or majority support of the lower house of Parliament Indian Polity, M. Laxmikanth, Chapter 13, p.135.

The following table illustrates how this system differs from a Presidential one:

Feature	Parliamentary System (India)	Presidential System (USA)
Executive	Dual (Nominal & Real)	Single
Accountability	Executive is responsible to the Legislature	Executive is not responsible to the Legislature
Membership	Ministers must be members of the Legislature	Ministers are not members of the Legislature
Dissolution	The Lower House can be dissolved	The Legislature cannot be dissolved by the Executive

In the Indian context, while we adopted the British model, we added our own unique touch: India is a Republic with an elected President, whereas Britain is a Monarchy with a hereditary head Indian Polity, M. Laxmikanth, Chapter 3, p.29. This foundation ensures that the Prime Minister is not an autocrat but a leader who must constantly answer to the people's representatives.

Sources: Indian Polity, M. Laxmikanth, Chapter 13: Parliamentary System, p.135; Exploring Society: India and Beyond, Class VII NCERT, Chapter 6: Governance and Democracy, p.194; Indian Polity, M. Laxmikanth, Chapter 3: Salient Features of the Constitution, p.29

2. The President's Power to Appoint the Prime Minister (basic)

In the Indian parliamentary setup, the President is the formal appointing authority for the Prime Minister. According to Article 75 of the Constitution, the Prime Minister is appointed by the President Laxmikanth, M. Indian Polity, Central Council of Ministers, p.213. However, this power is not absolute or arbitrary. By established parliamentary convention, the President must appoint the leader of the party (or coalition) that commands a majority in the Lok Sabha. This ensures that the executive remains accountable to the lower house of Parliament.

There are specific scenarios where the President exercises situational discretion — meaning they use their own judgment rather than following a fixed rule. This happens primarily when no single party secures a clear majority (a Hung Parliament) or when a Prime Minister dies suddenly in office without an obvious successor Laxmikanth, M. Indian Polity, Prime Minister, p.207. In these moments, the President must decide who is most likely to provide a stable government and command the confidence of the House NCERT Class XI, EXECUTIVE, p.87.

Interestingly, a person does not need to be a Member of Parliament (MP) at the exact moment of their appointment. The Constitution allows the President to appoint someone who is not a member of either House, provided they secure a seat in the Lok Sabha or Rajya Sabha within six consecutive months. If they fail to do so, they must resign Laxmikanth, M. Indian Polity, Central Council of Ministers, p.214. Furthermore, unlike in Britain where the PM must be from the lower house, an Indian PM can be a member of either the Lok Sabha or the Rajya Sabha.

Sources: Laxmikanth, M. Indian Polity, Central Council of Ministers, p.213-214; Laxmikanth, M. Indian Polity, Prime Minister, p.207; NCERT Class XI Political Science, EXECUTIVE, p.87-88

3. Collective Responsibility of the Council of Ministers (basic)

At the very heart of the parliamentary system of government lies the principle of Collective Responsibility. This isn't just a tradition; it is a constitutional mandate under Article 75(3), which states that the Council of Ministers (CoM) shall be collectively responsible to the Lok Sabha (the House of the People) M. Laxmikanth, Central Council of Ministers, p. 215. In simple terms, this means that for every action, policy, or decision taken by the government, the entire ministry is held accountable as a single unit. If the government fails, they don't fail as individuals; they fail as a team. As the popular saying goes in political science, the ministers "swim or sink together".

What does this look like in practice? It means that once a decision is taken by the Cabinet, it becomes the decision of all ministers. Even if a minister personally disagrees with a policy during a meeting, once it is finalized, they must defend it in public and in Parliament. If a minister finds themselves unable to support a cabinet decision, the constitutional convention is that they must resign from their position D. D. Basu, Introduction to the Constitution of India, The Union Executive, p. 227. This ensures that the executive speaks with one voice, providing stability and clarity to the administration.

The ultimate "check" on this responsibility is the No-Confidence Motion. Since the ministry stays in office only as long as it enjoys the confidence of the majority in the Lok Sabha, the House can remove the entire government by passing this motion M. Laxmikanth, Parliament, p. 242. Importantly, this power rests solely with the Lok Sabha; the Rajya Sabha can discuss and criticize policies but cannot topple the government through a no-confidence vote NCERT Class IX, Working of Institutions, p. 63. If such a motion is passed, every single minister—including those who might be members of the Rajya Sabha—must resign immediately.

Feature	Collective Responsibility
Constitutional Basis	Article 75(3)
Accountable To	The Lok Sabha (House of the People)
Core Logic	Joint responsibility for all acts of omission and commission.
Consequence	If a No-Confidence Motion passes, the entire Council of Ministers must quit.

Sources: Indian Polity by M. Laxmikanth, Central Council of Ministers, p.215; Introduction to the Constitution of India by D. D. Basu, The Union Executive, p.227; Indian Polity by M. Laxmikanth, Parliament, p.242; NCERT Class IX Political Science, Working of Institutions, p.63

4. Membership and the Anti-Defection Law (intermediate)

In the Indian parliamentary system, the Prime Minister (PM) serves as the link between the Executive and the Legislature. While the President appoints the PM, the Constitution provides a flexible yet time-bound rule regarding their membership in Parliament. According to Article 75(5), a minister (including the PM) who is not a member of either House of Parliament for any period of six consecutive months shall cease to be a minister at the end of that period Laxmikanth, M. Indian Polity, Central Council of Ministers, p. 213. This allows a person who is not currently an MP to be sworn in, provided they secure a seat in either the Lok Sabha or the Rajya Sabha within half a year.

Unlike the British convention, where the Prime Minister must be a member of the lower house (House of Commons), India allows the PM to hail from either the Lok Sabha or the Rajya Sabha. This has been a significant feature of Indian politics; for instance, Indira Gandhi (1966), H.D. Deve Gowda (1996), and Dr. Manmohan Singh (2004) all served as Prime Minister while being members of the Rajya Sabha Laxmikanth, M. Indian Polity, Central Council of Ministers, p. 214.

However, membership is not just about getting elected; it is about staying qualified. Under the 10th Schedule (Anti-Defection Law), a Prime Minister could potentially lose their seat if they violate the party whip or voluntarily give up their party membership. If an MP is disqualified under the 10th Schedule or convicted of a crime, their seat becomes vacant immediately Laxmikanth, M. Indian Polity, Parliament, p. 228. In 2013, the Supreme Court further tightened these rules by striking down provisions that allowed convicted lawmakers a three-month grace period to appeal, meaning a conviction now leads to immediate disqualification from membership Laxmikanth, M. Indian Polity, Electoral Reforms, p. 588.

Feature	Indian Prime Minister	British Prime Minister
House Membership	Either Lok Sabha or Rajya Sabha	Strictly the Lower House (House of Commons)
Status at Appointment	Can be a non-member (for 6 months)	Must be an existing member

Sources: Laxmikanth, M. Indian Polity, Central Council of Ministers, p.213-214; Laxmikanth, M. Indian Polity, Parliament, p.228; Laxmikanth, M. Indian Polity, Electoral Reforms, p.588

5. Comparison of the Two Houses: Lok Sabha vs Rajya Sabha (intermediate)

In the Indian parliamentary system, the Parliament consists of two Houses: the Lok Sabha (House of the People) and the Rajya Sabha (Council of States). While the Rajya Sabha is often referred to as the 'Upper House' and the Lok Sabha as the 'Lower House,' this is merely traditional nomenclature. In reality, our Constitution grants the Lok Sabha supreme power in most vital matters Democratic Politics-I, WORKING OF INSTITUTIONS, p.62.

The fundamental reason for this power imbalance is democratic legitimacy. The Lok Sabha is directly elected by the citizens of India, whereas the Rajya Sabha is elected indirectly by the Members of the Legislative Assemblies (MLAs) of the States. In a democracy, the representatives directly chosen by the people must have the final say in controlling the finances and the survival of the government Indian Constitution at Work, LEGISLATURE, p.110.

The relationship between these Houses and the Prime Minister is defined by three critical areas of comparison:

Feature	Lok Sabha (Lower House)	Rajya Sabha (Upper House)
Survival of Government	The Council of Ministers is collectively responsible only to the Lok Sabha. A No-Confidence Motion can only be passed here Democratic Politics-I, WORKING OF INSTITUTIONS, p.63.	Can criticize the government and discuss policies, but cannot remove the government through a No-Confidence Motion.
Financial Matters	Holds exclusive power over Money Bills. It initiates them, and its decision is final.	Cannot initiate, reject, or amend Money Bills; it can only delay them for a maximum of 14 days Indian Constitution at Work, LEGISLATURE, p.110.
Ordinary Laws	Any ordinary law requires approval from both Houses. In case of a deadlock (Joint Sitting), the Lok Sabha usually prevails due to its larger membership.	Has equal powers in ordinary legislation and Constitutional Amendment Bills Indian Polity, Parliament, p.259.

While the Lok Sabha dominates in financial and executive control, the Rajya Sabha enjoys special powers to protect federalism, such as authorizing Parliament to make laws on subjects in the State List (Article 249) or creating new All-India Services (Article 312) Indian Polity, Parliament, p.259.

Sources: Democratic Politics-I, Political Science-Class IX, NCERT (Revised ed 2025), WORKING OF INSTITUTIONS, p.62-63; Indian Constitution at Work, Political Science Class XI (NCERT 2025 ed.), LEGISLATURE, p.110; Indian Polity, M. Laxmikanth (7th ed.), Parliament, p.259

6. Qualifications for Membership of Parliament (intermediate)

To understand the Office of the Prime Minister, we must first understand the gateway to that office: Membership of Parliament. While the Prime Minister is the leader of the nation, the Constitution primarily views them as a member of the legislative body. Under Article 84 of the Constitution, there are three fundamental requirements for any person aspiring to sit in either the Lok Sabha or the Rajya Sabha: they must be a citizen of India, they must make an oath or affirmation before a person authorized by the Election Commission, and they must meet the minimum age requirement. D. D. Basu, Introduction to the Constitution of India, The Union Legislature, p.246

The age requirement is a common area of confusion, so let's clarify the distinction between the two houses:

Feature	Lok Sabha (House of the People)	Rajya Sabha (Council of States)
Minimum Age	25 Years	30 Years
Representation	Directly elected by the people	Indirectly elected by State Assemblies

Beyond these constitutional mandates, the Parliament exercised its power to add further criteria via the Representation of the People Act (1951). A crucial qualification here is that the person must be a registered elector for a parliamentary constituency. Interestingly, for the Rajya Sabha, a candidate no longer needs to be an elector in the specific state from which they are seeking election; being an elector anywhere in India suffices—a change upheld by the Supreme Court in 2006. M. Laxmikanth, Indian Polity, Parliament, p.226

You might wonder why there is no educational qualification required to be an MP or PM. The philosophy is that the most relevant qualification for a representative is the ability to understand and voice the concerns of the people. In a democracy, the "final examiners" are the voters themselves, who evaluate a candidate's competence every five years. NCERT Class IX, Democratic Politics-I, ELECTORAL POLITICS, p.42. For the Prime Minister specifically, while they are usually a member of Parliament at the time of appointment, Article 75(5) allows a non-member to be appointed as a Minister (including PM), provided they secure a seat in either House within six consecutive months. M. Laxmikanth, Indian Polity, Central Council of Ministers, p.213

Sources: Introduction to the Constitution of India, D. D. Basu (26th ed.), The Union Legislature, p.246; Indian Polity, M. Laxmikanth (7th ed.), Parliament, p.226; Democratic Politics-I, NCERT (Class IX), ELECTORAL POLITICS, p.42; Indian Polity, M. Laxmikanth (7th ed.), Central Council of Ministers, p.213

7. Article 75(5) and the Six-Month Rule (exam-level)

In the Indian Parliamentary system, the Prime Minister is not just a political leader but the link between the Executive and the Legislature. To ensure this link is robust, Article 75(5) of the Constitution lays down a crucial condition: any Minister (including the Prime Minister) must be a member of either the Lok Sabha or the Rajya Sabha. If they are not a member at the time of their appointment, they are granted a six-month grace period to secure a seat in either House Laxmikanth, M. Indian Polity, Central Council of Ministers, p.213.

This provision offers the President flexibility. For instance, in times of political transition or when an eminent person outside the current Parliament is needed to lead, they can be appointed as Prime Minister immediately. However, the clock starts ticking the moment they take the oath. If they fail to become a member of Parliament within six consecutive months, they automatically cease to be a Minister (and thus, Prime Minister) D. D. Basu, Introduction to the Constitution of India, The Union Executive, p.227. This was further clarified by the Supreme Court in 1997, which held that a non-member can indeed be appointed as PM, but the six-month window is a mandatory constitutional ceiling that cannot be bypassed Laxmikanth, M. Indian Polity, Prime Minister, p.208.

It is also vital to distinguish the Indian practice from the British system. In the UK, the Prime Minister must be a member of the Lower House (House of Commons). In contrast, the Indian Constitution allows the PM to hail from either the Lok Sabha or the Rajya Sabha. We have seen several instances of this flexibility in practice:

Prime Minister	House Membership	Context
Indira Gandhi (1966)	Rajya Sabha	First PM from the Upper House.
P.V. Narasimha Rao (1991)	Non-member	Appointed while not in Parliament; later elected to Lok Sabha within 6 months.
H.D. Deve Gowda (1996)	Non-member	Appointed while not in Parliament; later elected to Rajya Sabha.
Manmohan Singh (2004)	Rajya Sabha	Served both terms as a member of the Upper House.

Sources: Laxmikanth, M. Indian Polity, Central Council of Ministers, p.213; D. D. Basu, Introduction to the Constitution of India, The Union Executive, p.227; Laxmikanth, M. Indian Polity, Prime Minister, p.208; Laxmikanth, M. Indian Polity, Parliamentary System, p.136

8. Solving the Original PYQ (exam-level)

Now that you have mastered the constitutional provisions regarding the Union Executive and the Parliamentary System, this question brings those building blocks together. The core concept here is the distinction between being a representative and being a minister. According to M. Laxmikanth's Indian Polity, Article 75 is the key; it allows the President the flexibility to appoint a Prime Minister who may not be a Member of Parliament (MP) at the exact moment of their swearing-in. This ensures that political transitions remain smooth even if a chosen leader does not currently hold a seat.

To arrive at the correct answer, (A) need not necessarily be a member of one of the Houses of the Parliament but must become a member of one of the Houses within six months, you must apply the 'six-month rule' found in Article 75(5). While the Prime Minister is the leader of the majority in the Lok Sabha, the Constitution does not mandate membership in that specific house. In fact, India’s parliamentary democracy allows the PM to hail from the Rajya Sabha—a point proven by the tenures of leaders like Indira Gandhi and Manmohan Singh. Therefore, the reasoning follows a two-step logic: first, check if immediate membership is required (it isn't), and second, identify the timeframe and the venue for securing that membership (six months, either House).

The other options are classic UPSC traps designed to test your precision. Option (B) is incorrect because it falsely restricts membership to the Lok Sabha, ignoring the validity of the Upper House. Options (C) and (D) are too restrictive; they use the word 'must' to imply that membership is a prerequisite for appointment, which contradicts the constitutional provision for a six-month grace period. By recognizing that the Constitution of India values both flexibility in appointment and legislative accountability, you can easily eliminate these 'absolute' statements and settle on the correct procedural requirement.