The correct answer is: D. Kinnaur
Gar is a folk dance of Kinnaur, a district in the Indian state of Himachal Pradesh. It is a dance of the Kinnauri people, who are a tribal people of the Himalayas. The dance is performed by both men and women, and it is a very energetic and lively dance. The dancers move their bodies in a rhythmic way, and they often sing and clap their hands as they dance. The dance is often performed at weddings and other special occasions.
The other options are incorrect because they are not districts in Himachal Pradesh where Gar is performed. Kullu is a district in Himachal Pradesh, but Gar is not a folk dance of Kullu. Shimla is the capital of Himachal Pradesh, but Gar is not a folk dance of Shimla. Sirmaur is a district in Himachal Pradesh, but Gar is not a folk dance of Sirmaur.