The correct answer is: a) Ladakhi.
Ladakhi is a member of the Tibetan language family and is spoken by the majority of the population in Ladakh, India. It is a tonal language with four tones: high, low, rising, and falling. Ladakhi has a rich literary tradition, and there are many Ladakhi-language newspapers and magazines published in Ladakh.
Balti is a member of the Dardic language family and is spoken by the Balti people of Baltistan, a region in the Gilgit-Baltistan region of Pakistan. Balti is closely related to Ladakhi, and the two languages are mutually intelligible.
Shina is a member of the Dardic language family and is spoken by the Shina people of Gilgit-Baltistan, Pakistan. Shina is a pluricentric language, with several dialects spoken in different parts of Gilgit-Baltistan.
Kashmiri is a member of the Indo-Aryan language family and is spoken by the Kashmiri people of Kashmir, a region in the Indian subcontinent. Kashmiri is a pluricentric language, with several dialects spoken in different parts of Kashmir.
Ladakhi is the most widely spoken language in Ladakh, followed by Balti, Shina, and Kashmiri.