The correct answer is D. Tattapani.
Mandi, Pandoh, and Kullu are all situated on the bank of Beas river. Tattapani is a town in Mandi district of Himachal Pradesh, India. It is located about 200 kilometers from Shimla, the state capital. Tattapani is a popular tourist destination due to its hot springs. The hot springs are said to have medicinal properties and are believed to be beneficial for skin diseases, rheumatism, and other ailments.
The Beas River is a tributary of the Sutlej River. It is the longest river in Himachal Pradesh. The Beas River originates in the Pir Panjal Range and flows through the states of Himachal Pradesh, Punjab, and Haryana. The Beas River is a major source of irrigation and hydroelectric power in India.