Which tribal group in Telangana has its own distinct language, Gondi?

The correct answer is C. Gonds.

Gonds are an indigenous people of central India. They are the largest tribal group in India, with a population of over 10 million. Gonds speak Gondi, a Dravidian language. Gondi is the official language of the Indian state of Telangana.

Koyas are an indigenous people of central India. They are a sub-group of the Gonds. Koyas speak Koyali, a Dravidian language. Koyali is not an official language of any Indian state.

Chenchus are an indigenous people of central India. They are a sub-group of the Gonds. Chenchus speak Chenchu, a Dravidian language. Chenchu is not an official language of any Indian state.

Lambadis are an indigenous people of central India. They are a nomadic people who speak Lambadi, a Dravidian language. Lambadi is not an official language of any Indian state.