Bhakra-Nangal is a joint project of

The correct answer is (c). Bhakra-Nangal is a joint project of Himachal Pradesh, Haryana and Punjab. It is a multipurpose project that provides irrigation, drinking water, and hydroelectric power to the three states. The project was completed in 1963 and is one of the largest dams in India.

(a) Haryana-Punjab and Rajasthan: This option is incorrect because Rajasthan is not a part of the Bhakra-Nangal project.
(b) Haryana-Punjab and Delhi: This option is incorrect

because Delhi is not a part of the Bhakra-Nangal project.
(d) Punjab -Delhi and Rajasthan: This option is incorrect because Rajasthan is not a part of the Bhakra-Nangal project and Delhi is only a beneficiary of the project.