The correct answer is: B. Raksham Chitkul.
The Baspa valley is a valley in the Kinnaur district of Himachal Pradesh, India. It is located in the Himalayas and is home to a number of villages, including Raksham and Chitkul. The valley is also home to the Raksham Chitkul Wildlife Sanctuary, which is located in the catchment area of the Baspa River. The sanctuary is home to a variety of wildlife, including snow leopards, Himalayan tahr, and musk deer.
The other options are incorrect because they are not located in the catchment area of the Baspa valley. Kalatop is a wildlife sanctuary located in the Chamba district of Himachal Pradesh. Gamgul is a village located in the Kinnaur district of Himachal Pradesh. Chail is a town located in the Solan district of Himachal Pradesh.
The Baspa valley is a beautiful and scenic place to visit. It is a great place to go for hiking, trekking, and camping. The valley is also home to a number of temples and monasteries.