Travelling from north to south, which one of the following is the correct sequence of the given mountain ranges ?

1. Major Physiographic Divisions of India (basic)

To understand the mountains of India, we must first look at the 'big picture'—the broad geographical regions that define the country. India is often called a sub-continent because of its immense physical diversity. Geographers divide India into six major physiographic divisions based on their tectonic history, the types of rocks they are made of, and their surface features Geography of India (Majid Husain), Physiography. These divisions are:

• The Himalayan Mountains: Geologically young and structurally fold mountains that stretch across the northern borders.
• The Northern Plains: Formed by the alluvial deposits of the Indus, Ganga, and Brahmaputra rivers.
• The Peninsular Plateau: A massive tableland composed of old crystalline, igneous, and metamorphic rocks. This is the oldest part of India, formed from the breaking and drifting of the Gondwana land CONTEMPORARY INDIA-I, Physical Features of India, p.12.
• The Indian Desert: Known as the Thar Desert, located towards the western margins of the Aravali Hills.
• The Coastal Plains: Narrow coastal strips flanking the Peninsular plateau along the Arabian Sea (west) and the Bay of Bengal (east).
• The Islands: The Lakshadweep Islands in the Arabian Sea and the Andaman and Nicobar Islands in the Bay of Bengal CONTEMPORARY INDIA-I, Physical Features of India, p.7.

While the Himalayas are 'young' and still rising, the Peninsular Plateau is a stable landmass with broad, shallow valleys and rounded hills. It is shaped like an irregular triangle, with its base in the north and its apex at Kanniyakumari. Its boundaries are marked by the Delhi Ridge in the northwest, the Rajmahal Hills in the east, the Gir Range in the west, and the Cardamom Hills in the south INDIA PHYSICAL ENVIRONMENT, Structure and Physiography, p.12. Understanding this plateau is crucial because it houses most of the mountain ranges we will study in later hops, such as the Vindhyas, Satpuras, and the Ghats.

Sources: CONTEMPORARY INDIA-I, Physical Features of India, p.7; CONTEMPORARY INDIA-I, Physical Features of India, p.12; Geography of India (Majid Husain), Physiography, p.2.1; INDIA PHYSICAL ENVIRONMENT, Structure and Physiography, p.12

2. The Peninsular Plateau: Central Highlands and Deccan Plateau (basic)

The Peninsular Plateau is the oldest and most stable landmass of India, formed primarily of crystalline, igneous, and metamorphic rocks. To understand its layout, imagine the Narmada River as a horizontal dividing line. The portion of the plateau lying to the north of the Narmada is known as the Central Highlands, while the portion to the south is the Deccan Plateau.

The Central Highlands are bounded by the Aravalli Range in the northwest and the Vindhyan Range in the south Geography of India, Majid Husain, Physiography, p.54. A fascinating characteristic of this region is its slope: it tilts toward the north and northeast. This explains why rivers like the Chambal, Sind, and Betwa flow "upward" on a map to join the Yamuna INDIA PHYSICAL ENVIRONMENT, Geography Class XI, Structure and Physiography, p.13. The Vindhyas, in particular, serve as a traditional geographic barrier between Northern and Southern India Geography of India, Majid Husain, Physiography, p.50.

South of the Narmada valley, the Deccan Plateau rises as a massive triangular tableland. Its broad base in the north is formed by the Satpura Range, while its eastern extensions include the Mahadev and Maikal hills. The plateau is tilted significantly; it is higher in the west and slopes gently toward the east CONTEMPORARY INDIA-I, Geography Class IX, Physical Features of India, p.12. This ensures that most major Peninsular rivers flow into the Bay of Bengal. Within the Deccan, the Karnataka Plateau stands out for its high elevation, featuring peaks like Mulangiri in the Baba-Budan Hills Geography of India, Majid Husain, Physiography, p.57.

Feature	Central Highlands	Deccan Plateau
Location	North of Narmada River	South of Narmada River
Slope Direction	North and Northeast	Eastward
Key Ranges	Aravalli, Vindhyas, Kaimur	Satpura, Western & Eastern Ghats

Sources: Geography of India, Majid Husain, Physiography, p.54; INDIA PHYSICAL ENVIRONMENT, Geography Class XI, Structure and Physiography, p.13; Geography of India, Majid Husain, Physiography, p.50; CONTEMPORARY INDIA-I, Geography Class IX, Physical Features of India, p.12; Geography of India, Majid Husain, Physiography, p.57

3. The Vindhya and Satpura Block Mountains (intermediate)

To understand the heart of the Indian subcontinent, we must look at the Vindhya and Satpura ranges. These are not just mountains; they are classic examples of Block Mountains (also known as Horsts). Millions of years ago, intense pressure caused the Earth's crust to fracture, creating parallel faults. The land between these faults sank to form Rift Valleys (where the Narmada and Tapi rivers flow today), while the standing blocks on either side became these massive ranges.

The Vindhya Range acts as the traditional geographical and cultural boundary between North and South India. It is a discontinuous chain of mountain ridges, hill ranges, and plateau escarpments. Stretching from Jobat in Gujarat and Chittorgarh in Rajasthan all the way to Sasaram in Bihar, it spans nearly 1,050 km Geography of India, Majid Husain, p.54. Interestingly, the Vindhyas are not very high, with a general elevation of 450 to 600 meters, but they serve as a critical water-divide between the Ganga river system to the north and the river systems of the Peninsular plateau to the south.

South of the Vindhyas and the Narmada Rift Valley lies the Satpura Range. The name 'Satpura' literally means 'Seven Folds'. It is a more complex system than the Vindhyas, consisting of several scarped plateaus with elevations ranging between 600-900 meters NCERT Class XI, Structure and Physiography, p.13. The Satpuras are composed of three distinct parts:

• Rajpipla Hills: The westernmost part.
• Mahadev Hills: The central part, home to Dhupgarh (1,350 m), the highest peak of the entire Satpura range Geography of India, Majid Husain, p.55.
• Maikal Range: The eastern part, where the famous Amarkantak Plateau is located. This plateau is a unique drainage center where the Narmada and Son rivers originate.

Feature	Vindhya Range	Satpura Range
Relative Position	North of the Narmada River	South of the Narmada, North of the Tapi
Highest Point	Sadbhawana Shikhar (Goodwill Peak)	Dhupgarh (1,350 m)
Key Sub-ranges	Kaimur, Bharner Hills	Rajpipla, Mahadev, Maikal Hills

Sources: Geography of India (Majid Husain), Physiography, p.54-55; India Physical Environment (NCERT Class XI), Structure and Physiography, p.13

4. River Systems as Geographical Markers: Narmada and Tapi (intermediate)

In Indian geography, the Narmada and Tapi rivers are more than just water bodies; they are the primary 'markers' that help us map the complex layout of the Peninsular plateau. While most major peninsular rivers like the Godavari and Krishna flow east towards the Bay of Bengal, the Narmada and Tapi are unique—they flow westward into the Arabian Sea because they are trapped within rift valleys formed by tectonic activity Contemporary India-I, Geography, Class IX, Drainage, p.21. These rivers act like natural dividers, sandwiching specific mountain ranges and defining their sequence from North to South.

The Narmada River is the northernmost of the two, originating from the Amarkantak plateau. It flows through a picturesque gorge of marble rocks near Jabalpur and creates the famous Dhuandhar waterfall India Physical Environment, Geography Class XI, Drainage System, p.24. Geographically, the Narmada is the 'filling' in a mountain sandwich: it flows between the Vindhya Range to its north and the Satpura Range to its south. This placement makes the Narmada a traditional boundary marker between Northern and Southern India.

Moving further south, we encounter the Tapi River (also known as the Tapti). It originates in the Betul district of Madhya Pradesh from the Satpura ranges and flows almost parallel to the Narmada Geography of India, Majid Husain, The Drainage System of India, p.20. The Tapi occupies its own rift valley, but it is situated between the Satpura Range to its north and the Ajanta Range to its south. Together, these two rivers and three ranges create a distinct 'stepped' geographical structure in Central India.

River	Northern Boundary (Range)	Southern Boundary (Range)	Key Feature
Narmada	Vindhya Range	Satpura Range	Longer (~1,312 km), forms a deep gorge in marble.
Tapi	Satpura Range	Ajanta Range	Shorter (~700 km), flows south of Narmada.

Sources: Contemporary India-I, Geography, Class IX, Drainage, p.21; India Physical Environment, Geography Class XI, Drainage System, p.24; Geography of India, Majid Husain, The Drainage System of India, p.20

5. The Western Ghats (Sahyadris) and Southern Hill Complexes (intermediate)

The Western Ghats, often referred to as the Sahyadris, represent the 'Great Escarpment' of the Indian peninsula. Unlike the Eastern Ghats, which are highly dissected and discontinuous, the Western Ghats form an almost continuous wall running parallel to the Arabian Sea coast. They are significantly higher, with an average elevation of 900–1600 metres, compared to the roughly 600 metres of the Eastern Ghats CONTEMPORARY INDIA-I, Geography, Class IX, Physical Features of India, p.12. Because of this height, they act as a massive barrier to the moisture-laden monsoon winds, causing heavy orographic rainfall on their western slopes.

As we move from north to south, the range takes on different local names and characteristics. In Maharashtra and Karnataka, they are the Sahyadris; in the border region of Karnataka and Tamil Nadu, they are the Nilgiri Hills; and further south, they branch into the Anaimalai Hills and the Cardamom Hills INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.), Structure and Physiography, p.12. The Nilgiris serve as a 'mountain knot' where the Western and Eastern Ghats finally meet. South of the Nilgiris lies the Palghat Gap (or Palakkad Gap), a significant low-mountain pass that connects the plains of Tamil Nadu with the coast of Kerala Geography of India, Majid Husain, Physiography, p.58.

The Southern Hill Complex is home to the highest peak in Peninsular India—Anaimudi (2,695 m), located in the Anaimalai Hills. This region is not just geologically significant but is a global biodiversity hotspot. The Nilgiri Biosphere Reserve, which includes parts of Tamil Nadu, Kerala, and Karnataka, was the first biosphere reserve established in India and is part of the UNESCO World Network Environment and Ecology, Majid Hussain, BIODIVERSITY, p.37.

Feature	Western Ghats (Sahyadris)	Eastern Ghats
Continuity	Continuous (crossed by passes like Thal/Bhor Ghat)	Discontinuous and dissected by rivers
Average Height	Higher (900–1600 m)	Lower (approx. 600 m)
Rainfall	Heavy Orographic rain on the west	Less rainfall; mostly from retreating monsoons
Highest Peak	Anaimudi (2,695 m)	Mahendragiri / Jindhagada

Sources: CONTEMPORARY INDIA-I, Geography, Class IX, Physical Features of India, p.12; INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.), Structure and Physiography, p.12; Geography of India, Majid Husain, Physiography, p.58; Environment and Ecology, Majid Hussain, BIODIVERSITY, p.37

6. Mountain Passes and Gaps of the Western Ghats (exam-level)

The Western Ghats, also known as the Sahyadris, form an almost continuous mountain wall parallel to the western coast of India. Unlike the Eastern Ghats, which are broken and dissected by many rivers, the Western Ghats are relatively uninterrupted. Consequently, the few natural passes and gaps within this range have historically served as vital lifelines, connecting the coastal plains (Konkan and Malabar) with the high-altitude Deccan Plateau. In the northern stretch of the Sahyadris (Maharashtra), two passes are of immense strategic and economic importance:

• Thal Ghat (Kasara Ghat): Located at an elevation of over 1,000 m, it connects Mumbai to Nashik. It serves as the primary route for the National Highway (NH-3) and major railway lines heading toward Central and North India Majid Husain, Geography of India, Physiography, p.61.
• Bhor Ghat: Situated further south, it connects Mumbai to Pune. This pass is one of the busiest in the country, facilitating the movement of massive volumes of commercial traffic and trains between the coast and the southern Deccan Majid Husain, Geography of India, Physiography, p.59.

Moving toward the southern part of the range, the topography changes. The Palghat Gap (or Palakkad Gap) is a significant break in the mountains, approximately 30 km wide. It is uniquely positioned between the Nilgiri Hills to the north and the Anaimalai Hills to the south, acting as a gateway between Coimbatore (Tamil Nadu) and Palakkad (Kerala). Further south still is the Shencottah Gap, which facilitates connectivity between Kollam in Kerala and Madurai in Tamil Nadu. Mastery of these passes involves remembering their North-to-South sequence: Thal Ghat → Bhor Ghat → Palghat Gap → Shencottah Gap.

Pass	Connects	Region
Thal Ghat	Mumbai — Nashik	Northern Sahyadri
Bhor Ghat	Mumbai — Pune	Northern Sahyadri
Palghat Gap	Coimbatore — Palakkad	Between Nilgiris & Anaimalai
Shencottah Gap	Madurai — Kollam	Southernmost Ghats

Sources: Geography of India, Physiography, p.59; Geography of India, Physiography, p.61

7. Mapping the Ranges of Maharashtra: Ajanta, Balaghat, and Harishchandra (exam-level)

To master the geography of Maharashtra, we must look at the Deccan Plateau not as a flat slab, but as a tilted tableland crisscrossed by eastward-extending mountain fingers. These fingers are offshoots of the Sahyadri (Western Ghats). Understanding their North-to-South sequence is crucial because they act as primary water divides for India’s great Peninsular rivers. Moving from North to South, our first landmark is the Satpura Range, which forms the northern boundary of Maharashtra. Just south of the Satpuras flows the Tapi River. As noted in Geography of India, Majid Husain, The Drainage System of India, p.20, the Tapi flows in a rift valley bounded by the Satpura Range to the north and the Ajanta Range to the south. The Ajanta range is famous for its world-heritage caves and lies entirely within the state, separating the Tapi basin from the Godavari basin. Continuing south, we encounter the Harishchandra-Balaghat Range. This system is a major NW-to-SE trending offshoot. The Harishchandra Range is particularly significant as it houses Kalsubai (1,646 m), the highest peak in Maharashtra Geography of India, Majid Husain, Physiography, p.60. Its eastern extension is known as the Balaghat Range. Together, these ranges serve as the high ground between the Godavari River (to their north) and the Bhima River (to their south). Finally, further south lies the Mahadeo Hills, which divide the Bhima and Krishna river basins.

Range (North to South)	River to the North	River to the South
Satpura	Narmada	Tapi
Ajanta	Tapi	Godavari
Harishchandra-Balaghat	Godavari	Bhima
Mahadeo Hills	Bhima	Krishna

Sources: Geography of India (Majid Husain, 9th ed.), The Drainage System of India, p.20; Geography of India (Majid Husain, 9th ed.), Physiography, p.60

8. Solving the Original PYQ (exam-level)

Now that you have mastered the drainage patterns and tectonic features of the Indian Peninsula, you can see how the Vindhya and Satpura ranges form the core of the Central Highlands. This question tests your ability to synthesize the relationship between rift valleys and mountain blocks. In NCERT Class 11 India: Physical Environment, these are described as the structural anchors of the subcontinent, where the Narmada and Tapi rivers serve as the geographical dividers that help you establish a clear north-to-south mental map.

To arrive at the correct answer, use a step-by-step spatial visualization technique. First, identify the Vindhya Range as the northernmost limit, acting as the traditional divide between North and South India. Moving south across the Narmada rift valley, you hit the Satpura Range. Continuing further south, past the Tapi river into the heart of the Deccan Trap in Maharashtra, you encounter the Ajanta Range. Finally, recall your studies of the Southern Hill Complex; the Palghat gap/range is located far south in the Western Ghats near the Kerala-Tamil Nadu border. This logical progression confirms that (B) Vindhya range - Satpura range - Ajanta range - Palghat range is the only correct sequence.

UPSC frequently uses relative proximity and parallel features to create traps. For instance, options (C) and (D) are classic "reversal traps" where the Satpura is placed north of the Vindhya; students often make this mistake if they forget that the Narmada flows south of the Vindhyas. Another common pitfall is the placement of the Ajanta Range; remember that while it is part of the Deccan plateau, it remains well north of the Palghat break, which is situated between the Nilgiri and Anaimalai hills in the deep south.