Correct Answer: Dzongkha

Solution : The correct answer is Dzongkha .

Dzongkha, also known as Bhutanese, serves as the official and national language of the Kingdom of Bhutan. Spoken by over half a million people in the country, it belongs to the Sino-Tibetan language family. In addition to Dzongkha, English is also widely used and is the medium of instruction in schools. Bhutan is a landlocked country located in the Eastern Himalayas and shares borders with India to the south, China to the north and Nepal to the west.