Question

Difficulty: HardDrainage System and Water Resources of India

Consider the following statements regarding the Ganga River drainage system:

1. Yamuna is the longest right-bank tributary of the Ganga River, merging with it at Prayagraj.
2. Ghaghara is a major left-bank tributary originating near the Gurla Mandhata peak, south of Manasarovar.
3. Son originates from the Amarkantak Plateau and flows northwards to join the Ganga as a left-bank tributary near Patna.
4. Ramganga is the first major left-bank tributary to join the Ganga River after it exits the Himalayas.

Which of the statements given above are correct?

  1. A
    1 and 3 only
  2. 1, 2, and 4 onlyAnswer
  3. C
    2, 3, and 4 only
  4. D
    1, 2, 3, and 4

Answer

Statements 1, 2, and 4 are correct.
Statements 1, 2, and 4 accurately describe the respective rivers: Yamuna is the longest right-bank tributary merging at Prayagraj; Ghaghara is a trans-Himalayan left-bank tributary originating near Gurla Mandhata; and Ramganga is the westernmost and first major left-bank tributary joining near Kannauj. Statement 3 is incorrect because Son is a right-bank tributary flowing northward from the Amarkantak Plateau.

Step-by-Step Solution

1
Evaluate Statement 1 regarding the Yamuna River.
Statement 1 is TRUE. Yamuna originates from Yamunotri Glacier on the Banderpunch range and joins Ganga on its right bank at Prayagraj (Triveni Sangam).
Yamuna is the longest and most significant right-bank tributary of the Ganga system.
2
Evaluate Statement 2 regarding the Ghaghara River.
Statement 2 is TRUE. Ghaghara originates near Gurla Mandhata peak (Mapchachungo glacier) south of Manasarovar and joins the Ganga on its left bank near Chhapra.
Geographic origin and bank orientation are correctly attributed.
3
Evaluate Statement 3 regarding the Son River.
Statement 3 is FALSE. Son originates from the Amarkantak Plateau and joins the Ganga near Patna as a RIGHT-bank tributary.
Rivers joining the Ganga from the southern peninsula (like Son and Punpun) enter through its right bank, not left bank.
4
Evaluate Statement 4 regarding the Ramganga River.
Statement 4 is TRUE. Ramganga originates in the Garhwal Himalayas near Gairsain and joins the Ganga near Kannauj as its first major left-bank tributary.
Sequential order of left-bank tributaries from west to east begins with Ramganga.

Key Concept

Classification of Ganga River tributaries by bank orientation (Left-bank vs Right-bank) and geographic origins.
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