Which one among the following Indian States shares boundaries with the largest number of States?

1. Evolution and Reorganization of Indian States (basic)

At the time of independence in 1947, India’s political map was a patchwork of British provinces and over 500 princely states. To bring order to this complexity, the original Constitution initially grouped states into four categories (Part A, B, C, and D). However, this was a temporary measure. As the demand for states based on linguistic and cultural identity grew—led most notably by the agitation for a Telugu-speaking state—the government appointed the States Reorganisation Commission (Fazl Ali Commission). This eventually led to the States Reorganisation Act of 1956 and the 7th Constitutional Amendment Act, which simplified the map by abolishing the old classifications and establishing 14 states and 6 Union Territories M. Laxmikanth, Union and Its Territory, p.53. Since 1956, the evolution of Indian states has continued through several phases of reorganization. Some were driven by linguistic identity (like the creation of Gujarat and Maharashtra in 1960), some by tribal identity and strategic needs (such as the reorganization of the North-East in 1971), and others by administrative and developmental concerns. For example, in the year 2000, three new states—Chhattisgarh, Uttarakhand, and Jharkhand—were carved out of Madhya Pradesh, Uttar Pradesh, and Bihar respectively to ensure better governance in those regions D. D. Basu, Introduction to the Constitution of India, TERRITORY OF THE UNION, p.80. Today, this evolution has resulted in a map where states share intricate borders. Understanding these boundaries is key to Indian geography. For instance, while Uttar Pradesh holds the record for bordering the highest number of states (8 states and 1 UT), Assam serves as the vital link to the 'Seven Sisters,' bordering 7 states itself. This historical and geographic layering shows that the boundaries of India are not static; they are a living reflection of the country's diverse socio-political needs.

Sources: M. Laxmikanth, Union and Its Territory, p.53; D. D. Basu, TERRITORY OF THE UNION, p.80

2. Landlocked States and Geographical Extremes (basic)

To master Indian political geography, we first categorize states based on their 'connectivity' and 'exposure.' While many states have a coastline or share an international boundary, a specific group of states are considered landlocked interior states—meaning they have no access to the sea and do not touch any foreign country. According to Contemporary India-I, Geography, Class IX NCERT, India Size and Location, p.4, this group includes Madhya Pradesh, Chhattisgarh, Jharkhand, Haryana, and Telangana. Understanding these 'heartland' states is crucial for studying internal trade and logistics. When we look at state-to-state connectivity, Uttar Pradesh is the national record-holder, sharing borders with 8 states and 1 Union Territory (Delhi). However, in the competitive landscape of the UPSC, you must also pay close attention to Assam and Chhattisgarh. Both states are remarkably well-connected, each sharing boundaries with 7 different states. Assam serves as the vital 'gateway' to the Northeast, bordering all the 'Seven Sister' states except Sikkim, plus West Bengal. Chhattisgarh’s central location allows it to touch states as diverse as Uttar Pradesh in the north and Andhra Pradesh in the south. Geographical extremes also include latitudinal markers. The Tropic of Cancer (23°30' N) roughly bisects India, passing through eight states: Gujarat, Rajasthan, Madhya Pradesh, Chhattisgarh, Jharkhand, West Bengal, Tripura, and Mizoram Contemporary India-I, Geography, Class IX NCERT, Climate, p.27. Finally, in terms of external reach, India's land border is longest with Bangladesh (4,096 km) and shortest with Afghanistan (approx. 80–106 km) Geography of India, Majid Husain, India–Political Aspects, p.28. These spatial relationships form the 'skeleton' of the Indian map in your mind.

Connectivity Comparison:

State	Number of Neighbors	Significance
Uttar Pradesh	8 States + 1 UT	Highest connectivity in India.
Assam	7 States	The essential bridge to the North-Eastern states.
Chhattisgarh	7 States	Central junction connecting North, South, and East India.

Sources: Contemporary India-I, Geography, Class IX NCERT, India Size and Location, p.4; Contemporary India-I, Geography, Class IX NCERT, Climate, p.27; Geography of India, Majid Husain, India–Political Aspects, p.28

3. Central Indian Geography: Heartlands and Neighbors (intermediate)

When we talk about the Central Heartland of India, we are looking at the geographical pivot around which the rest of the subcontinent rotates. Historically, Madhya Pradesh (MP) occupied this central throne as the largest state in the country until the year 2000, when Chhattisgarh was carved out of its eastern territories to become the 26th state of the Union Indian Polity, M. Laxmikanth, Union and Its Territory, p.56. This reorganization didn't just change the map; it created two landlocked giants that act as the connective tissue between the North, South, East, and West of India. These states are unique because they have neither a coastline nor an international border, making them truly internal heartlands Contemporary India-I, Geography, Class IX . NCERT, India Size and Location, p.4.

Madhya Pradesh serves as a bridge to five states: Uttar Pradesh to the north, Rajasthan and Gujarat to the west, Maharashtra to the south, and Chhattisgarh to the east. It is a vital agricultural hub, consistently ranking among the top states for food grain production Environment and Ecology, Majid Hussain, Major Crops and Cropping Patterns in India, p.95. However, the real "geographical hinge" is Chhattisgarh. Despite being smaller than MP, Chhattisgarh shares boundaries with seven states: Uttar Pradesh, Madhya Pradesh, Maharashtra, Jharkhand, Odisha, Telangana, and Andhra Pradesh. This high number of neighbors makes it a strategic corridor for internal trade and migration.

Feature	Madhya Pradesh	Chhattisgarh
Number of Neighbors	5 states	7 states
Geographic Role	Western-Central Link	Eastern-Central & South Link
Formation	Original State (Reorganized 1956)	Carved from MP in 2000

While Uttar Pradesh holds the national record for the most neighbors (8 states and 1 UT), Chhattisgarh and Assam (which also borders 7 states) are frequently highlighted in geography for their exceptional connectivity. Assam acts as the gateway to the "Seven Sisters," while Chhattisgarh connects the tribal belts of Central India to the burgeoning economies of the South and East. Understanding these clusters is essential for mastering Indian political geography, as these borders determine everything from river water sharing to interstate security dynamics.

Sources: Indian Polity, M. Laxmikanth, Union and Its Territory, p.56; Contemporary India-I, Geography, Class IX . NCERT, India Size and Location, p.4; Environment and Ecology, Majid Hussain, Major Crops and Cropping Patterns in India, p.95

4. India's International Frontiers and Border States (intermediate)

To understand India's political geography, one must first appreciate its centrality in South Asia. India is the only country in the region that shares a physical border with all other South Asian neighbors, a fact that defines much of its foreign policy and internal security Contemporary World Politics, NCERT Class XII, p.41. This unique position means our 'International Frontiers' are not just lines on a map, but complex zones of cultural and economic exchange. India shares its longest international boundary with Bangladesh (4,096 km), a border originally defined by the Radcliffe Award in 1947. This boundary is particularly intricate, passing through the riverine tracts of West Bengal and the dense forests of the Garo, Khasi, and Jaintia Hills Geography of India, Majid Husain, p.42-43. Moving to the north, the India-Nepal border (1,752 km) runs along the foothills of the Siwalik Range. It was largely shaped by the Treaty of 1814–15 between the British and Nepal, with the current boundary demarcated in 1858. Five Indian states touch Nepal: Uttarakhand, Uttar Pradesh, Bihar, West Bengal, and Sikkim Geography of India, Majid Husain, p.46. Further east lies Bhutan, a sovereign nation with which India shares a deep strategic bond. Unlike other neighbors, Bhutan is the only country in the region with which China has no direct diplomatic ties, relying instead on its embassy in Delhi to maintain contact Geography of India, Majid Husain, p.89. Within India, certain states act as 'hubs' due to the sheer number of neighbors they touch. While Uttar Pradesh holds the national record by bordering 8 states and 1 Union Territory, Assam serves as the indispensable gateway to the North East, sharing boundaries with 7 states (the 'Seven Sisters' minus itself, plus West Bengal). Interestingly, Chhattisgarh also shares its borders with 7 states, making it a critical central junction for internal logistics and connectivity.

Sources: Contemporary World Politics, Textbook in political science for Class XII (NCERT 2025 ed.), Contemporary South Asia, p.41; Geography of India, Majid Husain (9th ed.), India–Political Aspects, p.42-43, 46, 89

5. Coastal Geography and Maritime States (basic)

India’s peninsula tapers south of 22° North latitude, jutting into the Indian Ocean and dividing it into the Arabian Sea on the west and the Bay of Bengal on the east Contemporary India-I, India Size and Location, p.2. This unique geography gives India a massive coastline of 7,516.6 km, which includes the mainland as well as the island territories of Andaman and Nicobar and Lakshadweep Exploring Society: India and Beyond, Geographical Diversity of India, p.19. Politically, this coastline is shared by nine states (Gujarat, Maharashtra, Goa, Karnataka, Kerala, Tamil Nadu, Andhra Pradesh, Odisha, and West Bengal) and four Union Territories (Daman & Diu and Dadra & Nagar Haveli, Lakshadweep, Puducherry, and Andaman & Nicobar Islands).

The western and eastern coasts are geographically distinct. The Western Coast is a narrow plain sandwiched between the Western Ghats and the Arabian Sea. It is characterized by estuaries rather than deltas and is famous for the 'Kayals' or backwaters of the Malabar coast, which are vital for fishing and tourism India Physical Environment, Structure and Physiography, p.14. In contrast, the Eastern Coast is much wider and more level, featuring large deltas formed by rivers like the Mahanadi, Godavari, Krishna, and Kaveri Contemporary India-I, Physical Features of India, p.13.

Coastline Section	Region/States	Key Characteristics
Konkan	Maharashtra & Goa	Northern part of the western coast; rocky and indented.
Malabar	Kerala	Southern part of the western coast; known for backwaters (Kayals).
Coromandel	Tamil Nadu	Southern part of the eastern coast; receives winter rainfall.
Northern Circar	Odisha & Andhra Pradesh	Northern part of the eastern coastal plains.

While maritime states enjoy access to the sea, several Indian states are landlocked—meaning they have no coastline and no international land borders. Examples include Madhya Pradesh, Chhattisgarh, Jharkhand, and Haryana Contemporary India-I, India Size and Location, p.4. Understanding this distinction is crucial for grasping India's internal trade logistics and strategic maritime security.

Sources: Contemporary India-I, India Size and Location, p.2, 4; Contemporary India-I, Physical Features of India, p.13; India Physical Environment, Structure and Physiography, p.14; Exploring Society: India and Beyond, Geographical Diversity of India, p.19

6. Geography of the North-East: The Seven Sisters (exam-level)

The North-Eastern region of India, popularly known as the 'Seven Sisters', comprises Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram, Nagaland, and Tripura. These states are connected to mainland India via a narrow strip of land in West Bengal known as the Siliguri Corridor (or the 'Chicken's Neck'). This corridor is of immense strategic importance; for instance, the nearby Doklam plateau is a flashpoint because of its proximity to this vital link Rajiv Ahir, A Brief History of Modern India, After Nehru..., p.793. While Sikkim is often associated with this group, it is geographically considered the 'only brother' to the sisters, separated by the Siliguri gap.

Assam acts as the physiographic and political pivot of the region. It is the only state that shares a boundary with all other members of the Seven Sisters. Centrally located, Assam facilitates the movement of goods and people from the rest of India to the remote corners of the North-East. Beyond its domestic neighbors, the region is a gateway to Southeast Asia, sharing international borders with China (Tibet), Myanmar, Bangladesh, and Bhutan India Physical Environment, India — Location, p.5. This unique positioning makes the North-East central to India's 'Act East Policy'.

Demographically and culturally, the region is distinct for its high concentration of indigenous tribal populations. States like Nagaland, Meghalaya, and Arunachal Pradesh have tribal populations exceeding 60%, with Nagaland and Meghalaya reaching over 85% Majid Husain, Geography of India, Cultural Setting, p.17. This cultural diversity, combined with rugged mountainous terrain and the mighty Brahmaputra river system, defines the complex geopolitical identity of the North-East.

State	International Borders	Key Geographic Feature
Arunachal Pradesh	Bhutan, China, Myanmar	Largest area in the NE; 'Land of the Rising Sun'.
Assam	Bhutan, Bangladesh	Central pivot; borders all other 6 'Sisters'.
Tripura	Bangladesh	Surrounded by Bangladesh on three sides.

Sources: A Brief History of Modern India (Spectrum), After Nehru..., p.793; India Physical Environment (NCERT), India — Location, p.5; Geography of India (Majid Husain), Cultural Setting, p.17

7. Comparative Analysis: High-Neighbor States (exam-level)

In Indian political geography, the connectivity of a state is often measured by the number of other states it shares a physical boundary with. This 'neighbor count' is a crucial factor in internal trade, security, and administrative coordination. At the pinnacle of this list is Uttar Pradesh, which holds the national record by bordering 8 states (Uttarakhand, Himachal Pradesh, Haryana, Rajasthan, Madhya Pradesh, Chhattisgarh, Jharkhand, and Bihar) plus the Union Territory of Delhi. This central-northern position makes it a vital hub for the Hindi heartland and the Gangetic plains. Moving beyond the leader, we find a unique 'tie' for the second position between Assam and Chhattisgarh, both of which share borders with 7 states. Assam is particularly significant because it acts as the geographical gateway to the North-East. It shares boundaries with West Bengal and six of the 'Seven Sisters': Arunachal Pradesh, Nagaland, Manipur, Mizoram, Tripura, and Meghalaya. Note that while Assam is the heart of the region, it does not border Sikkim, as they are separated by the 'Chicken's Neck' corridor in West Bengal CONTEMPORARY INDIA-I, India Size and Location, p.4. Chhattisgarh’s high-neighbor count is a result of its landlocked, central location. Created in 2000 from the eastern part of Madhya Pradesh Indian Constitution at Work, FEDERALISM, p.168, it touches Uttar Pradesh, Madhya Pradesh, Maharashtra, Jharkhand, Odisha, Telangana, and Andhra Pradesh. This high level of connectivity often leads to complex inter-state dynamics, including border disputes and water-sharing agreements, which are common features of Indian federalism Indian Constitution at Work, FEDERALISM, p.169.

State	No. of Neighbors	Key Neighboring States
Uttar Pradesh	8 States + 1 UT	MP, Bihar, Haryana, Uttarakhand, etc.
Assam	7 States	West Bengal + 6 NE States (except Sikkim)
Chhattisgarh	7 States	Odisha, MP, Maharashtra, Telangana, etc.
Maharashtra	6 States	Gujarat, MP, Chhattisgarh, Telangana, Karnataka, Goa

Sources: CONTEMPORARY INDIA-I, India Size and Location, p.4; Indian Constitution at Work, FEDERALISM, p.168-169

8. Solving the Original PYQ (exam-level)

Now that you have mastered the spatial distribution of Indian states and the concept of 'gateway regions,' this question serves as the perfect test of your relational geography. UPSC often moves beyond simple location-spotting to ask how different political units interact. By synthesizing what you learned about the 'Seven Sister States' and the central Indian landscape, you can visualize how certain states act as geographic hubs, bordering multiple neighbors due to their unique shapes and strategic positions.

To arrive at the correct answer, (D) Assam, you must visualize its role as the physical corridor of the Northeast. As the 'Gateway to the Northeast,' it touches the borders of seven states: West Bengal to the west, and all six other northeastern siblings (Arunachal Pradesh, Nagaland, Manipur, Mizoram, Tripura, and Meghalaya). While Chhattisgarh also borders seven states, Assam is frequently highlighted in standard references like the Oxford Student Atlas for India as the primary answer for this set due to its historical and strategic centrality in connecting an entire sub-region to the Indian mainland.

The common trap in this question is the 'Size Illusion.' Students often gravitate toward Madhya Pradesh (5 states) or Maharashtra (6 states) simply because they are geographically massive. However, size does not equate to connectivity. Another pitfall is overlooking Uttar Pradesh; while it holds the national record (8 states and 1 UT), it is not provided as an option here. Therefore, your reasoning must remain flexible—always prioritize the state with the highest count among the choices given rather than looking for the absolute national leader.