The correct answer is: C. Kalatop Khajjiar.
Kalatop Khajjiar Wildlife Sanctuary is a wildlife sanctuary in the Chamba district of Himachal Pradesh, India. It is located in the Dhauladhar Range of the Himalayas, and is home to a variety of wildlife, including snow leopards, Himalayan tahr, and musk deer. The sanctuary is also home to a number of birds, including the Himalayan monal, the koklas, and the snowcock.
The sanctuary is also known as Raksham Chitkul because it is located in the Raksham valley, which is a tributary of the Ravi River. The Chitkul village is located in the sanctuary, and is a popular tourist destination.
The other options are incorrect because they are not wildlife sanctuaries. Sangla is a town in the Kinnaur district of Himachal Pradesh, Pong Dam is a reservoir in the Bilaspur district of Himachal Pradesh, and Dhauladhar is a mountain range in the Himalayas.