Considering the locations of mountains in India, which one among the following is in right sequence from south to north?

1. The Peninsular Hill Ranges: Southern Focus (basic)

To understand the mountains of India, we begin at the southern tip of the Peninsular Plateau. The most striking feature here is the Western Ghats (locally known as Sahyadri in Maharashtra), which run parallel to the western coast. These mountains are higher and more continuous than their eastern counterparts, with an average elevation of 900–1600 metres Contemporary India-I, Geography Class IX, p.12. As we move south, these ranges converge at a unique geographical junction known as the Nilgiri Hills. This area acts as a 'mountain knot' where the Eastern Ghats and Western Ghats finally meet Geography of India, Majid Husain, p.58.
The Nilgiri Hills (meaning 'Blue Mountains') are located at the junction of Tamil Nadu, Karnataka, and Kerala. The highest point in this specific range is Doddabetta, which reaches an elevation of 2,636 metres Geography of India, Majid Husain, p.55. Just 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. This gap is a crucial corridor for trade and transport in the region Geography of India, Majid Husain, p.61.
South of the Palghat Gap, the mountains rise again as the Anaimalai Hills. Here, we find Anaimudi (2,695 m), which holds the title of the highest peak in South India and the entire Western Ghats Geography of India, Majid Husain, p.58. Continuing further south, the range tapers into the Cardamom Hills (also known as the Yela Mala), which are the southernmost hills of the Peninsular block India Physical Environment, Geography Class XI, p.12.

Feature	Western Ghats	Eastern Ghats
Continuity	Continuous (crossed via passes like Thal/Bhor/Pal Ghats)	Discontinuous (dissected by rivers)
Average Elevation	900 – 1600 m	~600 m
Highest Peak	Anaimudi (2,695 m)	Mahendragiri (1,501 m)

Sources: Contemporary India-I, Geography Class IX, Physical Features of India, p.12; Geography of India, Majid Husain, Physiography, p.55, 58, 61; India Physical Environment, Geography Class XI, Structure and Physiography, p.12

2. The Central Highlands and the Great Divide (basic)

The Central Highlands constitute the northern part of India’s massive Peninsular Plateau. Geographically, they lie to the north of the Narmada river, covering a major area of the Malwa plateau. Think of this region as a transitional zone that connects the rugged Aravallis of the northwest to the mineral-rich Chotanagpur plateau in the east. The general elevation here ranges between 700-1,000 m, and interestingly, the entire region slopes towards the north and northeast. This explains why rivers like the Chambal, Sind, Betwa, and Ken flow upwards to join the Yamuna NCERT Class XI, Structure and Physiography, p.13.

At the heart of this region lies the Vindhyan Range. Extending for about 1,050 km from Gujarat in the west to Bihar in the east, the Vindhyas are often called the 'Great Divide' of India. This is because they form a traditional and physical boundary between the Indo-Gangetic Plains of North India and the Deccan Plateau of South India Geography of India (Majid Husain), Physiography, p.54. While they aren't as high as the Himalayas, their structural importance as a watershed and a cultural barrier is immense.

The Highlands are further divided into smaller plateaus and hills that give the region its distinct character:

Sub-Region	Key Characteristics
Malwa Plateau	Located between the Aravallis and the Vindhyas; known for its rolling plains and black soil.
Bundelkhand	The northward extension of the plateau, characterized by senile topography and rocky surfaces NCERT Class IX, Physical Features of India, p.12.
Chotanagpur	The easternmost extension, drained by the Damodar river and famous for being India's mineral heartland.

Sources: INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.), Structure and Physiography, p.13; Geography of India, Majid Husain (9th ed.), Physiography, p.54; CONTEMPORARY INDIA-I, Geography, Class IX NCERT (Revised ed 2025), Physical Features of India, p.12

3. The Himalayan Arc: Greater and Lesser Ranges (intermediate)

The Himalayan mountain system is not a single ridge but a series of three parallel ranges that form a majestic arc across Northern India. Understanding the distinction between the Greater Himalayas (Himadri) and the Lesser Himalayas (Himachal) is crucial for any geography student, as these two ranges differ significantly in their geology, climate, and human footprint.

The Great or Inner Himalayas, also known as the Himadri, is the northernmost and most continuous range. It is the 'spine' of the system, boasting an average elevation of 6,000 metres and containing the world's highest peaks, such as Mount Everest, Kanchenjunga, and Dhaulagiri CONTEMPORARY INDIA-I, Physical Features of India, p.7. Geologically, the core of these mountains is composed of granite, and the folds are asymmetrical in nature. Because of their extreme height, these ranges are perennially snow-bound, making human settlement nearly impossible Exploring Society: India and Beyond, Geographical Diversity of India, p.6.

Just south of the Himadri lies the Lesser Himalayas or Himachal. This range is much more rugged and consists of highly compressed and altered rocks. While the Himadri is a land of ice and rock, the Himachal is the land of hill stations. With an altitude ranging between 3,700 and 4,500 metres, the climate here is moderate enough to support rich biodiversity and famous settlements like Shimla, Mussoorie, Nainital, and Darjeeling Exploring Society: India and Beyond, Geographical Diversity of India, p.6. Important sub-ranges here include the Pir Panjal and the Dhauladhar.

Feature	Greater Himalayas (Himadri)	Lesser Himalayas (Himachal)
Avg. Altitude	6,000 metres	3,700 to 4,500 metres
Composition	Granite core; permanent snow	Highly compressed & altered rocks
Habitation	Extremely sparse; tough life	Densely populated hill stations

Sources: CONTEMPORARY INDIA-I, Physical Features of India, p.7-8; Exploring Society: India and Beyond, Geographical Diversity of India, p.6

4. The Trans-Himalayas: Beyond the Great Wall (intermediate)

When we speak of the Himalayas, we often imagine the snow-capped peaks visible from the Indian plains. However, there is a hidden world lying further north: the Trans-Himalayas (also known as the Tethyan Himalayas). These ranges are geologically older than the main Himalayan folds and were formed primarily from the sediments of the ancient Tethys Sea. They consist of four major parallel ranges: the Karakoram, the Ladakh, the Zaskar, and the Kailash.

The Karakoram Range serves as the northernmost frontier, often called the "backbone of High Asia." It is a land of extremes, housing K2 (the world’s second-highest peak) and massive glacial systems. The Siachen Glacier, located here, is the largest in the Nubra Valley and the second-longest glacier outside the polar regions Geography of India, Physiography, p.24. To its south lies the Ladakh Range, and further south is the Zaskar Range. A defining feature of this landscape is the Indus River, which originates near the Bokhar Glacier on the northern slopes of Mt. Kailash and flows northwest between the Ladakh and Zaskar ranges Geography of India, The Drainage System of India, p.9.

Perhaps the most striking characteristic of the Trans-Himalayas is their climate. Because the massive Great Himalayan range blocks the moisture-laden Monsoon winds from the south, this region sits in a perpetual rain shadow. This creates a high-altitude cold desert. In Ladakh, the air is so thin and dry that annual rainfall is a mere 10 cm, and temperatures can plummet to –40°C at night Geography of India, Physiography, p.48. Interestingly, because of this extreme dryness, the snowline (the altitude above which snow remains year-round) is much higher here—reaching 5,500m to 5,800m—compared to the more humid Eastern Himalayas Geography of India, Physiography, p.23.

Sources: Geography of India, The Drainage System of India, p.9; Geography of India, Physiography, p.23; Geography of India, Physiography, p.24; Geography of India, Physiography, p.48

5. Indian Drainage Systems and Physiographic Interlink (intermediate)

In Indian geography, the drainage system is not an independent feature; it is the child of the land's physiography. The way a river flows, its speed, and its destination are strictly dictated by the mountain ranges and plateaus it encounters. To understand this interlink, we must first look at the Great Water Divide of India. This is an imaginary line that cuts across the subcontinent, separating the rivers that flow into the Arabian Sea (about 23% of the drainage) from those that flow into the Bay of Bengal (about 77% of the drainage) INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.), Chapter 3: Drainage System, p.19. This divide is formed by three major relief features: the Delhi Ridge in the north, the Aravalis in the center, and the Sahyadris (Western Ghats) in the south.

As we move from south to north, we see a clear transition in river character based on the age of the mountains. In the south, the Peninsular drainage is much older and has reached a stage of 'maturity.' Rivers like the Godavari and Krishna flow through broad, shallow valleys because the ancient Peninsular block is stable INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.), Chapter 3: Drainage System, p.23. In contrast, the Himalayan drainage in the north is 'youthful.' These rivers, such as the Indus and Brahmaputra, originate from the lofty peaks of the Trans-Himalayas (like the Kailash Range) and the Great Himalayas (like Dhaulagiri). Because these mountains are still rising, the rivers are perennial, snow-fed, and carry massive amounts of silt compared to their southern counterparts CONTEMPORARY INDIA-I, Geography, Class IX, Drainage, p.17.

The latitudinal arrangement of India's peaks provides a perfect map of this physiographic change. Starting from Doddabetta (the highest point of the Nilgiris at ~11°N), we see the classic Peninsular setup where the Western Ghats force most rivers to flow eastward. Moving north to the Vindhyachal range, we find the traditional boundary between North and South India, where rivers like the Narmada and Tapi are unique because they flow west through rift valleys CONTEMPORARY INDIA-I, Geography, Class IX, Drainage, p.21. Finally, reaching the high latitudes of the Dhaulagiri (~28°N) and Kailash (~31°N), we enter the domain of international, glacier-fed river systems that traverse multiple countries including Tibet, Nepal, and India Geography of India, Majid Husain, (McGrawHill 9th ed.), The Drainage System of India, p.5.

Feature	Himalayan Rivers	Peninsular Rivers
Nature of Flow	Perennial (Rain + Snow fed)	Seasonal (Mainly Rain fed)
Valley Shape	Deep V-shaped Gorges (Youthful)	Broad, Graded, Shallow (Mature)
Geological Age	Younger (Tertiary)	Much Older (Gondwana)

Sources: INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.), Chapter 3: Drainage System, p.19, 20, 23; CONTEMPORARY INDIA-I, Geography, Class IX (Revised ed 2025), Drainage, p.17, 21; Geography of India, Majid Husain, (McGrawHill 9th ed.), The Drainage System of India, p.5

6. Latitudinal Impact on Vegetation and Bio-zones (exam-level)

To understand the distribution of life in India, we must first look at the latitudinal gradient—the imaginary ladder of degrees moving from the Equator toward the Poles. Latitude is the primary driver of climate because it determines the angle of sunlight and the duration of day length. In India, which stretches from roughly 8°N to 37°N, this gradient creates a dramatic shift in bio-zones. Near the southern tip (lower latitudes), the climate is consistently warm and humid, supporting Tropical Wet Evergreen forests in areas like the Western Ghats and Nilgiris Environment and Ecology, Majid Hussain, p.21. As we move north toward the Tropic of Cancer (23.5°N), the climate becomes more seasonal, and we see a transition into Tropical Deciduous forests, which are the most widespread forest type in India INDIA PHYSICAL ENVIRONMENT, Geography Class XI, p.42. Moving further north into the sub-tropical and temperate latitudes of the Himalayas, the vegetation undergoes a complete transformation. Here, latitude begins to work in tandem with altitude. While the foothills might still host deciduous species like Sal, the higher latitudes of the North-West and Central Himalayas transition into Temperate forests characterized by oaks and conifers, and eventually into Alpine meadows Environment, Shankar IAS Academy, p.153. By the time we reach the Trans-Himalayan zone (Ladakh and Tibet), the latitudinal position combined with the rain-shadow effect creates a 'Cold Desert' bio-zone where vegetation is sparse, consisting mainly of stunted scrub and hardy grasses. To standardize these variations, ecologists use Biogeographic Zones. This classification, popularized by Rodgers and Panwar (1988), divides India into 10 distinct zones based on factors like latitude, rainfall, and topography Environment, Shankar IAS Academy, p.152. This helps us see India not just as a map of states, but as a spectrum of life-zones—from the 'Malabar Coast' in the south to the 'Trans-Himalaya' in the far north.

Region (Latitude)	Typical Vegetation	Representative Species
Low Latitude (South)	Tropical Evergreen / Semi-Evergreen	Rosewood, Rubber, Ironwood
Mid Latitude (Central)	Tropical Dry/Moist Deciduous	Teak, Sal, Mahuva
High Latitude (North)	Montane Temperate / Alpine	Pine, Deodar, Rhododendron

Sources: Environment and Ecology, Majid Hussain (Access publishing 3rd ed.), BIODIVERSITY, p.21; INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.), Natural Vegetation, p.42; Environment, Shankar IAS Academy (ed 10th), Indian Biodiversity Diverse Landscape, p.152-153; Environment, Shankar IAS Academy (ed 10th), Indian Biodiversity Diverse Landscape, p.159

7. Mapping Latitudinal Gradients of Major Indian Peaks (exam-level)

To master the geography of India, one must develop a 'mental map' of its physical features. A common UPSC favorite is testing your ability to arrange mountains by their latitudinal gradient—essentially, their position from South to North. As you move from the tip of the peninsula (Kanyakumari, ~8°N) toward the crown of India (Indira Col, ~37°N), you cross distinct physiographic zones: the Southern Hill Complexes, the Central Highlands, the Great Himalayas, and finally the Trans-Himalayas.

Starting in the deep South, we find the Nilgiri Hills, a 'mountain knot' where the Eastern and Western Ghats meet. The highest point here is Doddabetta (2,637 m), located in Tamil Nadu at approximately 11°N latitude. It is often confused with Anaimudi, which is slightly higher but sits further south in the Anaimalai Hills Geography of India by Majid Husain, Physiography, p.58. Moving northward into the heart of India, we encounter the Vindhyachal (Vindhya Range). Positioned around the Tropic of Cancer (~23.5°N), this range is the traditional geographic and cultural divider between the Indo-Gangetic plains and the Deccan Plateau.

As we cross into the massive wall of the Himalayas, the latitudes jump significantly. Dhaulagiri, one of the world's highest peaks at 8,172 m, is situated in Nepal at roughly 28°N Contemporary India-I (NCERT Class IX), Physical Features of India, p.8. Finally, crossing the 'Main Central Thrust' of the Himalayas brings us to the Trans-Himalayan region. Here lies the Kailash Range in Tibet. Because it sits north of the Great Himalayan axis, its latitude is higher, approximately 31°N. This sequence—Doddabetta to Vindhya to Dhaulagiri to Kailash—perfectly illustrates the northward progression across the Indian subcontinent India: Physical Environment (NCERT Class XI), Structure and Physiography, p.11.

Region	Key Peak/Range	Approx. Latitude
Trans-Himalayas	Kailash / Karakoram	31°N - 36°N
Greater Himalayas	Dhaulagiri / Mt. Everest	27°N - 29°N
Central India	Vindhyas / Satpuras	22°N - 24°N
Southern Hills	Doddabetta / Anaimudi	10°N - 12°N

Sources: Geography of India by Majid Husain, Physiography, p.58; Contemporary India-I (NCERT Class IX), Physical Features of India, p.8; India: Physical Environment (NCERT Class XI), Structure and Physiography, p.11

8. Solving the Original PYQ (exam-level)

This question beautifully integrates your understanding of India’s physiographic divisions, ranging from the ancient Peninsular Plateau to the young Himalayan fold mountains. To solve this, you must apply the concept of latitudinal positioning that we covered in our mapping modules. You have already learned about the Nilgiri Hills acting as the southern junction of the Ghats, the Vindhyas serving as the traditional divider between North and South India, and the tiered longitudinal structure of the Himalayan mountain system.

To arrive at the correct answer, (B) Doddabetta, Vindhyachal, Dhaulagiri, Kailash, we must visualize a journey starting from the southern tip of the peninsula. We begin with Doddabetta in the far south (Tamil Nadu). Moving north into the Central Highlands, we encounter the Vindhyachal range. The critical test of your depth lies in the northernmost section: Dhaulagiri is a major peak within the Great Himalayas, whereas the Kailash Range is situated even further north in the Trans-Himalayan region of Tibet. This sequence perfectly follows an increasing latitudinal gradient from approximately 11°N to 31°N, as supported by the INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT).

UPSC frequently employs spatial shuffling as a distractor. Options (A), (C), and (D) are classic traps designed to see if you can distinguish between the Himalayas and the Trans-Himalayas. A common mistake is placing the Trans-Himalayan ranges south of the Great Himalayan peaks. Remember: the Trans-Himalayas (Karakoram, Ladakh, Zanskar, and Kailash) are located "beyond" the Great Himalayas when approaching from the Indian plains. Any option that fails to recognize Doddabetta as the southernmost point or places Dhaulagiri north of Kailash can be immediately eliminated through logical deduction.