The correct answer is: C. Kargil, Leh
The Union Territory of Ladakh was formed on 31 October 2019 by the bifurcation of the State of Jammu and Kashmir. The two districts that were included in the new Union Territory were Kargil and Leh.
Kargil is a district in the Ladakh region of the Indian state of Jammu and Kashmir. It is located in the northwestern part of the state, bordering the Pakistani-administered Gilgit-Baltistan region to the west and the Chinese-administered Aksai Chin to the north. The district has a population of about 200,000 people, of which the majority are Ladakhi Buddhists. The district headquarters is the town of Kargil.
Leh is a district in the Ladakh region of the Indian state of Jammu and Kashmir. It is located in the central part of the state, bordering the Kargil district to the west, the Zanskar district to the north, the Nubra Valley to the east, and the Indian state of Himachal Pradesh to the south. The district has a population of about 300,000 people, of which the majority are Ladakhi Buddhists. The district headquarters is the town of Leh.
The other options are incorrect because they do not include both Kargil and Leh districts.