The biggest river of Himachal Pradesh in terms of volume of water is :

Ravi
Chenab
Beas
yamuna

The correct answer is: C. Beas

The Beas is the third-largest river in the Indian state of Himachal Pradesh, after the Sutlej and the Ravi. It is a tributary of the Indus River, and is one of the five rivers of Punjab. The Beas originates in the Himalayas, and flows through the states of Himachal Pradesh, Punjab, and Haryana. It joins the Indus River near Mithankot in Pakistan.

The Beas is a perennial river, and its flow is regulated by a number of dams. The most important of these is the Bhakra Dam, which is located on the border between Himachal Pradesh and Punjab. The Bhakra Dam is a major source of hydroelectric power, and it also provides irrigation water for the states of Punjab and Haryana.

The Beas is a popular tourist destination, and is known for its scenic beauty. The river is also a popular spot for fishing and rafting.

The other options are incorrect because:

  • Ravi is the second-largest river in Himachal Pradesh.
  • Chenab is the fourth-largest river in Himachal Pradesh.
  • Yamuna is a river that flows through the states of Uttarakhand, Himachal Pradesh, Haryana, Delhi, Rajasthan, and Uttar Pradesh. It is the longest tributary of the Ganges River.