Correct Answer:
A. Indus
The correct answer is Indus. The Diamer-Bhasha Dam is a large gravity dam currently under construction on the River Indus in northern Pakistan. This mega-project aims to generate substantial hydroelectric power, store water for irrigation purposes, and mitigate flood risks in the region. The Indus River is one of Asia's longest rivers and a vital water source for Pakistan.
- Options B, C, and D (Jhelum, Ravi, and Chenab) are other significant rivers in Pakistan, but the Diamer-Bhasha Dam is specifically being built on the Indus River, making these choices incorrect.