The correct answer is: a) Sutlej River.
The Bhakra Nangal Dam is a multipurpose dam on the Sutlej River in Bilaspur district of Himachal Pradesh, India. It is one of the largest dams in India and the world. The dam was constructed between 1954 and 1963 and was inaugurated by Jawaharlal Nehru on 22 October 1963.
The Bhakra Nangal Dam project plays a crucial role in irrigation and power generation for Punjab and neighboring states. It irrigates over 1.7 million hectares of land in Punjab, Haryana, Rajasthan, and Delhi. The dam also generates 1,320 MW of hydroelectric power.
The other options are incorrect because:
- The Beas River is a tributary of the Sutlej River.
- The Ravi River is a tributary of the Chenab River.
- The Indus River is the longest river in Pakistan and the fifth longest river in Asia.