UPSC Prelims 2021 GS Paper I · Q55 of 98 Geography hard

Consider the following rivers : 1. Brahmani 2. Nagavali 3. Subarnarekha 4. Vamsadhara Which of the above rise from the Eastern Ghats?

  1. (a) 1 and 2
  2. (b) 2 and 4 ✓ UPSC's answer
  3. (c) 3 and 4
  4. (d) 1 and 3

Why the answer is (b)

• The Nagavali rises near Lakhbahal in Kalahandi district and the Vamsadhara near Thuamul Rampur in Kalahandi — both in the Eastern Ghats of Odisha, flowing south-east into the Bay of Bengal in Andhra Pradesh (items 2 and 4).

• The Brahmani (1) forms from the Sankh and Koel rivers rising on the Chhotanagpur plateau (Ranchi/Rourkela area), not the Eastern Ghats.

• The Subarnarekha (3) rises near Nagri village on the Ranchi plateau in Jharkhand.

• Hence 2 and 4, option (b).

Why the other options are wrong

(a) 1 and 2
Brahmani rises on the Chhotanagpur plateau.
(c) 3 and 4
Subarnarekha rises on the Ranchi plateau, not the Eastern Ghats.
(d) 1 and 3
Both Brahmani and Subarnarekha rise on the Chhotanagpur plateau.

Asked in the GS Paper I of the UPSC Civil Services Preliminary Examination 2021, held on 10 October 2021. Question and answer key: Union Public Service Commission. Explanation: UPSC Answer Check.

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