The correct answer is (d), Kotli-Bhel.
The Tons River is a tributary of the Yamuna River in the Indian state of Uttarakhand. It originates in the Garhwal Himalayas and flows through the districts of Chamoli, Rudraprayag, Tehri Garhwal, and Dehradun. The Tons River is a major source of irrigation and hydroelectric power in Uttarakhand.
The Kotli-Bhel Dam is a hydroelectric dam on the Tons River in the Dehradun district of Uttarakhand. The dam was constructed in 1978 and has a power generation capacity of 100 MW. The dam is a major source of hydroelectric power in Uttarakhand.
The other options are incorrect because they are not related to the Tons River.
(a) Deval is a village in the Chamoli district of Uttarakhand. It is located on the banks of the Alaknanda River.
(b) Khodri is a village in the Rudraprayag district of Uttarakhand. It is located on the banks of the Alaknanda River.
(c) Chilla is a village in the Tehri Garhwal district of Uttarakhand. It is located on the banks of the Tons River.