The correct answer is: a) Nepali, Bhutia, Lepcha.
Sikkim is a state in northeastern India. It is bordered by Bhutan to the north, China to the east, Nepal to the west, and West Bengal to the south. The capital of Sikkim is Gangtok.
The primary languages spoken in Sikkim are Nepali, Bhutia, and Lepcha. Nepali is the official language of Sikkim and is spoken by the majority of the population. Bhutia is spoken by the Bhutia people, who are the indigenous people of Sikkim. Lepcha is spoken by the Lepcha people, who are also indigenous to Sikkim.
Hindi, English, and Bengali are also spoken in Sikkim. Hindi is the national language of India and is spoken by a minority of the population of Sikkim. English is the second official language of India and is spoken by a small minority of the population of Sikkim. Bengali is spoken by a small minority of the population of Sikkim.
French, German, and Italian are not spoken in Sikkim.