The correct answer is: B. Sutlej
The Sutlej is the longest river in Himachal Pradesh, India. It is a tributary of the Indus River, and is the easternmost of the five rivers that flow through the Punjab region. The Sutlej 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 Sutlej is a major source of irrigation and drinking water for the people of Himachal Pradesh and Punjab. It is also a popular destination for fishing and boating.
The other options are:
- Chenab: The Chenab is a river in India and Pakistan. It is one of the five rivers that flow through the Punjab region. The Chenab originates in the Himalayas, and flows through the states of Himachal Pradesh, Jammu and Kashmir, and Punjab. It joins the Indus River near Trimmu in Pakistan.
- Beas: The Beas is a river in India. It is one of the five rivers that flow through the Punjab region. The Beas originates in the Himalayas, and flows through the states of Himachal Pradesh and Punjab. It joins the Sutlej River near Harike Barrage in Punjab.
- Ravi: The Ravi is a river in India and Pakistan. It is one of the five rivers that flow through the Punjab region. The Ravi originates in the Himalayas, and flows through the states of Himachal Pradesh, Punjab, and Jammu and Kashmir. It joins the Chenab River near Madhopur in Pakistan.