Nagarjuna Sagar reservoir is located on which river?

Correct answer: Krishna

The direct answer is C: Nagarjuna Sagar reservoir is on the Krishna River. A reservoir is a large artificial storage of water formed when a dam holds back river flow. The Nagarjuna Sagar project was built across the Krishna, an important peninsular river. Its stored water supports irrigation, hydroelectric power generation and other uses. To solve the question, remember the project–river association: Nagarjuna Sagar–Krishna. Option C is correct. Option A, Narmada, is wrong because major projects such as Sardar Sarovar are associated with the Narmada, not Nagarjuna Sagar. Option B, Ganga, is wrong because Nagarjuna Sagar is not on the Ganga basin river channel. Option D, Sabarmati, is wrong because the Sabarmati is a different river of western India and does not carry this reservoir. The name of a project must be matched with its actual river, not merely with any large Indian river. Memory cue: Krishna’s important project pair includes Nagarjuna Sagar.