The correct answer is: B. Sutlej
The Sutlej is a river in the Himalayas that flows through India and Pakistan. It is the longest tributary of the Indus River. The Sutlej has a drainage basin of 1,40,000 square kilometers, and a mean annual discharge of 3,000 cubic meters per second. The Sutlej is a major source of hydroelectric power in India and Pakistan.
The Yamuna is a river in northern India. It is the longest tributary of the Ganges River. The Yamuna has a drainage basin of 3,08,000 square kilometers, and a mean annual discharge of 2,000 cubic meters per second. The Yamuna is a major source of water for irrigation and drinking water in India.
The Beas is a river in northern India. It is a tributary of the Sutlej River. The Beas has a drainage basin of 1,00,000 square kilometers, and a mean annual discharge of 1,000 cubic meters per second. The Beas is a major source of hydroelectric power in India.
The Ravi is a river in northern India. It is a tributary of the Chenab River. The Ravi has a drainage basin of 50,000 square kilometers, and a mean annual discharge of 500 cubic meters per second. The Ravi is a major source of irrigation and drinking water in India.
The Sutlej has the highest potential for generating hydel power because it has the highest discharge of all the rivers mentioned. The Sutlej also has a number of tributaries that can be used for hydroelectric power generation.