Official Answer Key & Detailed Solution
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Correct Answer: Option (B) — Gomati – Ghaghara – Gandak – Kosi
Concept & Option Breakdown
Standard Reference VerifiedDownstream (east) of Prayagraj (where Yamuna meets Ganga), the left-bank tributaries joining the Ganga from West to East are:
- Gomati (joins near Saidpur, Ghazipur, UP)
- Ghaghara (joins near Revelganj/Chhapra, Bihar)
- Gandak (joins near Sonpur/Patna, Bihar)
- Kosi (joins near Kursela, Katihar, Bihar) Thus, the correct sequence from west to east is Gomati – Ghaghara – Gandak – Kosi.
Gomati joins the Ganga in eastern UP before Ghaghara joins at the UP-Bihar border. Kosi is in eastern Bihar (farthest east). Hence, Gomati -> Ghaghara -> Gandak -> Kosi.
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