Official Answer Key & Detailed Solution
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Correct Answer: Option (A) — Kosi, Gomti, Ghaghara and Gandak
Concept & Option Breakdown
Standard Reference VerifiedThe map depicts tributaries of the Ganga across the northern plains:
- 1 is the Kosi (easternmost among the set, in northern Bihar)
- 4 is the Gomati (originating in UP plains)
- 3 is the Ghaghara (Sarju/Karnali system)
- 2 is the Gandak (flowing from Nepal through north Bihar).
1 is the easternmost tributary flowing into Bihar, which is the Kosi River.
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