Which of the following statements is not correct?

1. The Peninsular Plateau: Structure and Divisions (basic)

To understand the physical personality of India, we must first look at its most stable core: The Peninsular Plateau. Unlike the young and restless Himalayas, this region is a massive tableland composed of ancient crystalline, igneous, and metamorphic rocks. It is part of the oldest landmass on Earth, having formed from the breaking and drifting of the Gondwana land Contemporary India-I, Physical Features of India, p.12. Because it is geologically very old, its features are "mature"—you won't find the sharp, pointed peaks of the Himalayas here. Instead, the landscape is characterized by broad, shallow valleys and rounded hills, which have been weathered down over millions of years Contemporary India-I, Physical Features of India, p.12. Physiographically, the plateau is an irregular triangle rising from an elevation of about 150 meters near the river plains to a general height of 600-900 meters India Physical Environment, Structure and Physiography, p.12. Its boundaries are clearly defined by natural features: the Aravali range to the northwest, the Rajmahal hills in the east, the Gir range in the west, and the Cardamom hills in the south. Interestingly, this plateau doesn't just stop in the center of India; it has extensions reaching as far as Jaisalmer in the west (now covered by sand dunes) and the Shillong and Karbi-Anglong plateau in the northeast India Physical Environment, Structure and Physiography, p.12-13. The plateau is broadly divided into two major sections, separated by the Narmada River valley:

Feature	Central Highlands	Deccan Plateau
Location	North of the Narmada River.	South of the Narmada River.
Key Components	Malwa Plateau, Vindhyan Range, Bundelkhand, and Chotanagpur Plateau.	Satpura Range (North), Western Ghats (West), and Eastern Ghats (East).
General Slope	West to East (seen in the flow of rivers like Chambal and Betwa).	West to East (seen in the flow of Godavari and Krishna).

Sources: Contemporary India-I, Physical Features of India, p.12; India Physical Environment, Structure and Physiography, p.12; India Physical Environment, Structure and Physiography, p.13

2. Western Ghats vs. Eastern Ghats: A Comparative Study (intermediate)

The Western Ghats and Eastern Ghats constitute the western and eastern edges of the Deccan Plateau, respectively. While they are often discussed together, they are geographically very different. The Western Ghats (locally known as the Sahyadris in Maharashtra) act as a continuous wall along the western coast, whereas the Eastern Ghats are a series of broken, low-lying hills India Physical Environment, Structure and Physiography, p.12.

One of the most defining characteristics of the Western Ghats is their continuity. Unlike the Eastern Ghats, which are heavily dissected by east-flowing rivers like the Godavari and Krishna, the Western Ghats can only be crossed through specific mountain passes, namely the Thal Ghat, Bhor Ghat, and Pal Ghat Contemporary India-I, Physical Features of India, p.12. Furthermore, the Western Ghats are significantly higher, with an average elevation of 900–1600 meters, compared to the modest 600 meters of the Eastern Ghats.

Feature	Western Ghats (Sahyadris)	Eastern Ghats
Continuity	Continuous; can be crossed only through passes.	Discontinuous and irregular; dissected by rivers.
Elevation	Higher (900–1600 m). Increases from North to South.	Lower (Average 600 m).
Rainfall	Causes heavy orographic rain on the western slopes.	Receives less rainfall; parallel to the SW monsoon.
Highest Peak	Anaimudi (2,695 m).	Mahendragiri (1,501 m).

A crucial detail for your preparation is the elevation gradient. In the Western Ghats, the height of the mountains increases as you move from north to south. This is why the highest peaks, such as Anaimudi (the highest in all of Peninsular India) and Doda Betta, are found in the southern reaches India Physical Environment, Structure and Physiography, p.13. The two ranges eventually meet at the Nilgiri Hills, forming a massive mountain knot.

Sources: Contemporary India-I, Geography, Class IX NCERT, Physical Features of India, p.12; India Physical Environment, Geography Class XI NCERT, Structure and Physiography, p.12-13; Geography of India, Majid Husain, Physiography, p.58-59

3. Mountain Ranges of Central India: Vindhya and Satpura (basic)

The Vindhya and Satpura ranges are the architectural backbone of Central India, acting as a natural divide between the Indo-Gangetic plains of the North and the Deccan Plateau of the South. The Vindhya Range is not a single continuous chain but a series of broken, scarped plateaus extending from Jobat in Gujarat to Sasaram in Bihar, covering a distance of about 1,050 km Geography of India, Majid Husain, p.54. Its general elevation is modest, ranging between 450 to 600 meters. To its east, the range continues as the Kaimur Hills, while the Maikal Range serves as a vital structural link connecting the Vindhyas with the Satpura mountains.

Just south of the Vindhyas lies the Narmada-Son trough, a classic rift valley (or graben) created by geological faulting. It is through this depression that the Narmada River flows westward. Parallel to this valley and further south is the Satpura Range. Unlike the Vindhyas, the Satpuras are higher, with elevations generally between 600-900 meters India Physical Environment, NCERT Class XI, p.13. Geologically, these are considered relict mountains—ancient structures that have been highly denuded and weathered over millions of years, leaving behind discontinuous ranges and scarped plateaus rich in metamorphic rocks like marble and gneiss.

The Satpura system is composed of several distinct hill groups. From west to east, these include the Rajpipla Hills, the Mahadeo Hills, and the Maikal Range. The crowning glory of the Satpuras is Dhupgarh (1,350 m) near Pachmarhi, which stands as its highest peak, followed by the ecologically significant Amarkantak (1,064 m) Geography of India, Majid Husain, p.55. Interestingly, the Satpura range acts as a water divide; while the Narmada flows to its north, the Tapi (Tapti) River rises within these ranges and flows through a parallel rift valley to its south Contemporary India-I, NCERT Class IX, p.21.

Feature	Vindhya Range	Satpura Range
Position	North of Narmada River	South of Narmada River
Highest Peak	Goodwill Peak (Kalumar)	Dhupgarh (1,350 m)
Key Sub-ranges	Kaimur, Bharner	Rajpipla, Mahadeo, Maikal

Sources: Geography of India, Majid Husain, Physiography, p.54-55; India Physical Environment, NCERT Class XI, Structure and Physiography, p.12-13; Contemporary India-I, NCERT Class IX, Drainage, p.21

4. Drainage Systems of Peninsular India (intermediate)

Welcome back! Now that we’ve looked at the grand Himalayan rivers, let's turn our attention south to the Peninsular Drainage System. If the Himalayan rivers are "energetic teenagers" carving deep gorges, the Peninsular rivers are the "wise elders" of the Indian landscape. They are much older, follow fixed courses, and have largely reached a mature stage of evolution.

The present-day drainage of the Peninsula was shaped by three major geological events. First, during the early Tertiary period, the western flank of the Peninsula subsided, submerging it below the sea and disrupting the original symmetrical river plans. Second, the upheaval of the Himalayas caused the northern flank of the Peninsular block to settle, creating trough faults. This is why the Narmada and Tapi flow through rift valleys (grabens) today, filling them with detritus rather than forming deltas India Physical Environment, Chapter 3, p.23. Finally, the entire Peninsular block underwent a slight tilting from the northwest to the southeast, which gave the majority of rivers their orientation toward the Bay of Bengal India Physical Environment, Chapter 3, p.23.

The Western Ghats act as the primary water divide. Interestingly, these mountains are not uniform; their elevation actually increases from north to south, culminating in Anaimudi (2,695 m), the highest peak in the region Contemporary India-I, Chapter 2, p.12. Most major rivers like the Godavari (the 'Dakshin Ganga'), Krishna, and Kaveri flow eastwards, forming fertile deltas. In contrast, the west-flowing Narmada and Tapi are exceptions that flow through fault zones and terminate in estuaries rather than deltas Contemporary India-I, Chapter 3, p.21.

Feature	Himalayan Rivers	Peninsular Rivers
Nature of Flow	Perennial (Glaciers + Rain)	Seasonal (Rain-dependent)
Valley Shape	Deep V-shaped Gorges	Broad, Shallow, and Graded
Depositional Features	Large Deltas & Meanders	Smaller Deltas (East) / Estuaries (West)

Sources: India Physical Environment, Drainage System, p.23; Contemporary India-I, Physical Features of India, p.12; Contemporary India-I, Drainage, p.21

5. The West-Flowing Anomalies: Narmada and Tapi (intermediate)

In the grand architecture of India’s drainage, the Narmada and Tapi are the great rebels. While the majority of Peninsular rivers like the Godavari and Krishna follow the plateau's natural eastward tilt to drain into the Bay of Bengal, these two giants flow westward into the Arabian Sea. This isn't because they are "climbing uphill," but because they occupy rift valleys (or grabens)—deep, linear depressions created by the Earth’s crust faulting and sinking CONTEMPORARY INDIA-I, Geography, Class IX, Chapter 3, p.21.

The Narmada originates in the Amarkantak hills of Madhya Pradesh. It is famous for its picturesque journey, specifically the 'Marble Rocks' near Jabalpur where it carves a deep gorge, and the 'Dhuadhar falls' where the water plunges over steep cliffs CONTEMPORARY INDIA-I, Geography, Class IX, Chapter 3, p.21. A unique characteristic of the Narmada is that its tributaries are very short and typically join the main river at right angles, forming a pattern that looks almost like a grid.

The Tapi (or Tapti) acts as a parallel twin to the Narmada but is significantly shorter. It rises in the Satpura ranges, specifically in the Betul district of Madhya Pradesh CONTEMPORARY INDIA-I, Geography, Class IX, Chapter 3, p.21. Geographically, it is sandwiched: it flows in a constricted rift valley with the Satpura Range to its north and the Ajanta Range to its south Geography of India, Majid Husain, Chapter 2, p.55. These rivers do not form broad deltas like the Ganga; instead, because they flow through hard rock and have high velocity, they form estuaries as they enter the Gulf of Khambat.

Feature	Narmada River	Tapi River
Origin	Amarkantak Hills (MP)	Satpura Ranges, Betul (MP)
Geological Setting	Rift Valley (North of Satpura)	Rift Valley (South of Satpura)
Key Feature	Marble Rocks, Dhuandhar Falls	Parallel to Satpura; forms estuary at Surat

Sources: CONTEMPORARY INDIA-I, Geography, Class IX, Chapter 3: Drainage, p.21; Geography of India, Majid Husain, Chapter 2: Physiography, p.55; Geography of India, Majid Husain, The Drainage System of India, p.20

6. Geological Tectonics: Rift Valleys and Grabens (exam-level)

To understand the dramatic landscape of Central India, we must first look at the physics of the Earth's crust. When tectonic forces pull the crust apart (tension) or cause it to bend under immense pressure, the rocks eventually reach a breaking point, creating faults. In geological terms, a Graben is a depressed block of the Earth's crust bordered by parallel faults. This sunken block forms a distinct valley floor, while the remaining uplifted blocks on either side are known as Horsts (or Block Mountains) Physical Geography by PMF IAS, Types of Mountains, p.136. In Europe, the Rhine Valley is a classic graben, flanked by the Vosges and Black Forest horsts.

In India, the most famous examples of this phenomenon are the Narmada and Tapti (Tapi) Rift Valleys. Unlike the Great African Rift Valley, which is literally 'unzipping' the continent due to divergent plate movement, the Indian rifts have a unique origin story. Geologists believe these valleys formed due to the intense bending and sagging of the northern part of the Indian plate as it collided with Eurasia to form the Himalayas Physical Geography by PMF IAS, Divergent Boundary, p.128. This sag created the Narmada-Son Trough, a long structural depression that dictates the flow of these rivers from east to west, contrary to the general slope of the peninsula.

The Satpura Range acts as a massive 'Horst' or block mountain situated between these two rift valleys. To its north lies the Narmada rift, and to its south lies the Tapti rift Geography of India by Majid Husain, Physiography, p.55. Interestingly, some geologists, like Sir G. Burrard, even proposed that the entire Northern Plains of India began as a massive rift valley between the Himalayas and the Peninsula, which was subsequently filled with river sediment over millions of years Geography of India by Majid Husain, Physiography, p.33.

Feature	Geological Term	Indian Example
Uplifted Block	Horst	Satpura Range, Vindhyan Range
Sunken Block	Graben / Rift Valley	Narmada Valley, Tapti Valley

Sources: Physical Geography by PMF IAS, Types of Mountains, p.136; Physical Geography by PMF IAS, Divergent Boundary, p.128; Geography of India by Majid Husain, Physiography, p.55; Geography of India by Majid Husain, Physiography, p.33

7. Elevation Profiles and Highest Peaks of the Deccan (exam-level)

To understand the relief of the Deccan Plateau, we must look at its two 'walls': the Western Ghats (Sahyadris) and the Eastern Ghats. While both frame the plateau, they are twins with very different personalities. The Western Ghats are a continuous chain of mountains that can only be crossed through specific passes like the Thal, Bhor, and Pal Ghats (Contemporary India-I, Class IX NCERT, Chapter 2, p.12). In contrast, the Eastern Ghats are discontinuous and irregular, having been 'cut through' or dissected by the massive east-flowing rivers like the Godavari and Krishna on their way to the Bay of Bengal. One of the most critical concepts for your exams is the elevation gradient of the Western Ghats. Unlike many mountain ranges that are uniform, the Western Ghats increase in height as you move from north to south (India Physical Environment, Class XI NCERT, Chapter 2, p.13). This explains why the highest peaks of the entire Peninsular plateau are found in the southern section. Anaimudi (2,695 m), located in the Anaimalai hills, holds the title of the highest peak, followed closely by Doddabetta (2,637 m) in the Nilgiri hills. In the Eastern Ghats, the elevations are much lower, with Mahendragiri (1,501 m) being one of the most significant peaks (Contemporary India-I, Class IX NCERT, Chapter 2, p.12).

To help you visualize the differences, look at this comparison:

Feature	Western Ghats (Sahyadris)	Eastern Ghats
Continuity	Continuous; crossed only via passes.	Discontinuous; dissected by rivers.
Average Elevation	900 – 1,600 metres.	~ 600 metres.
Elevation Trend	Increases from North to South.	Generally lower and highly eroded.
Highest Peak	Anaimudi (2,695 m).	Mahendragiri (1,501 m).

Sources: Contemporary India-I, Geography, Class IX NCERT, Chapter 2: Physical Features of India, p.12; India Physical Environment, Geography Class XI NCERT, Chapter 2: Structure and Physiography, p.13

8. Solving the Original PYQ (exam-level)

You have just mastered the structural intricacies of the Peninsular Plateau, and this question serves as the perfect test of your ability to synthesize spatial facts with geographic logic. To arrive at the correct answer, you must apply the principle of altitudinal gradients. While the Western Ghats are continuous, their elevation is not uniform; it progressively increases as you move from the north toward the south. This is why statement (A) is the incorrect statement and the correct choice for this question. A key mental cue to remember this is the location of the highest peaks, which are clustered in the southern section of the range rather than the Sahyadris of the north.

Walking through the other options reveals the interconnectedness of Indian physiography. Statement (B) is a foundational fact: Anai Mudi is indeed the highest peak (2,695 m), located in the Anaimalai Hills. This peak's southern location reinforces why statement (A) must be false. Furthermore, when analyzing statements (C) and (D), you are applying your knowledge of the Satpura-Vindhyan drainage system. As noted in NCERT Class IX: Contemporary India-I, the Narmada and Tapi are unique for flowing through old rift valleys (fault troughs). The Satpura range sits as a block between these two rivers, placing the Tapi river precisely to its south.

The common trap in UPSC questions of this nature is the "not correct" phrasing. Many students rush to mark statement (B) or (C) because they are geographically true facts. However, an exceptional candidate looks for the spatial contradiction. By visualizing the map, you can recall that the Western Ghats rise from about 900m in the north to over 2,600m in the south, as detailed in NCERT Class XI: India Physical Environment. This systematic elimination of correct geological facts allows you to isolate the factual error regarding the northern elevation with absolute confidence.