The correct answer is D. Telugu.
Telugu is a Dravidian language spoken by about 80 million people, mostly in the Indian state of Andhra Pradesh. It is also spoken in Telangana, Karnataka, Odisha, and Chhattisgarh. Telugu is the official language of Andhra Pradesh and Telangana.
Hindi is an Indo-Aryan language spoken by about 400 million people, mostly in India. It is also spoken in Nepal, Pakistan, and Bangladesh. Hindi is the official language of India.
Santhali is an Austroasiatic language spoken by about 7 million people, mostly in the Indian state of Jharkhand. It is also spoken in West Bengal, Bihar, Odisha, and Assam. Santhali is the official language of Jharkhand.
Mundari is an Austroasiatic language spoken by about 3 million people, mostly in the Indian state of Jharkhand. It is also spoken in West Bengal, Bihar, Odisha, and Assam. Mundari is not an official language of any state in India.