Which of the following dams has been built on the river Krishna?

Correct option is D

The correct answer is (d) Nagarjuna Sagar.
· Nagarjuna Sagar Dam is constructed on the Krishna River. It is one of the largest and earliest multipurpose irrigation and hydroelectric projects in India. Located in the state of Andhra Pradesh and Telangana, this dam was completed in 1967 and is named after the Buddhist monk and philosopher Nagarjuna.
· The dam's primary purposes include irrigation, water supply, and hydroelectric power generation. It provides water for the irrigation of large agricultural areas and supports drinking water needs in the surrounding regions.
Additional details on other options:
· Narmada Sagar (Indira Sagar): This dam is built on the Narmada River in the state of Madhya Pradesh.
· Hirakud: This dam is constructed on the Mahanadi River in the state of Odisha and is one of the longest earthen dams in the world.
· Bhakra Nangal: This dam is built on the Sutlej River and is located in the states of Himachal Pradesh and Punjab. It is one of the highest gravity dams in the world.