Which river project is aimed at controlling floods and improving irrigation in north Bihar?

duce flood damage and improve irrigation. The key to this question is the precise association expressed in its wording: “Which river project is aimed at controlling floods and improving irrigation in north Bihar?” The answer Kosi Project matches that clue directly and is therefore factually appropriate. Option A — Damodar Project — 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 C — Tehri Project — is incorrect because it does not match the exact person, district, location, institution, river, event or identifying feature required by the question. Option D — Bhakra Project — 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. The correct method is to identify the central clue, match it with the relevant map location, historical period or official designation, and then eliminate every alternative separately. The Kosi Project was developed to reduce flood damage and improve irrigation.