The correct answer is: a) Tibetan
Tibetan is a language spoken by about 7 million people in Tibet, Bhutan, Nepal, India, and China. It is the official language of Tibet and Bhutan, and one of the official languages of India. Tibetan is a member of the Tibeto-Burman language family, and is closely related to the languages of Ladakh, Nepal, and Bhutan.
The Monpa and Sherdukpen tribes are indigenous peoples of the eastern Himalayas. They live in the Indian states of Arunachal Pradesh and Assam, and in the Bhutanese district of Trashigang. The Monpa language is spoken by about 50,000 people, and the Sherdukpen language is spoken by about 2,000 people. Both languages are Tibeto-Burman languages, and are closely related to Tibetan.
The other options are incorrect because they are not languages spoken by the Monpa and Sherdukpen tribes.
- b) Dzongkha is the official language of Bhutan. It is spoken by about 700,000 people, mostly in Bhutan. Dzongkha is a member of the Sino-Tibetan language family, and is closely related to the languages of Tibet and Nepal.
- c) Tshangla is a language spoken by about 100,000 people in Bhutan. It is the official language of the Tsang region of Bhutan. Tshangla is a member of the Tibeto-Burman language family, and is closely related to the languages of Tibet and Bhutan.
- d) Idu Mishmi is a language spoken by about 30,000 people in the Indian state of Arunachal Pradesh. It is the official language of the Idu Mishmi Autonomous Council. Idu Mishmi is a member of the Tibeto-Burman language family, and is closely related to the languages of Tibet and Arunachal Pradesh.