Which wildlife sanctuary in Bihar is famous for the conservation of Gangetic dolphins?

olphin Sanctuary protects the endangered Gangetic dolphin. The key to this question is the precise association expressed in its wording: “Which wildlife sanctuary in Bihar is famous for the conservation of Gangetic dolphins?” The answer Vikramshila Dolphin Sanctuary matches that clue directly and is therefore factually appropriate. Option A — Valmiki Sanctuary — is incorrect because it does not match the exact person, district, location, institution, river, event or identifying feature required by the question. It may be associated with another Bihar-related context, but that broader association does not satisfy this specific wording. Option B — Kaimur Sanctuary — is incorrect because it does not match the exact person, district, location, institution, river, event or identifying feature required by the question. Option D — Rajgir Sanctuary — is incorrect because it does not match the exact person, district, location, institution, river, event or identifying feature required by the question. Bihar GK questions frequently place neighbouring districts, related historical personalities, nearby rivers or institutions from the same field among the options. Vikramshila Dolphin Sanctuary protects the endangered Gangetic dolphin.