The correct answer is C. Both Bhili and Korku are tribal languages spoken in Madhya Pradesh.
Bhili is a language spoken by about 10 million people in India, mostly in the states of Rajasthan, Madhya Pradesh, and Gujarat. It is a member of the Indo-Aryan language family, and is closely related to Hindi and Marathi.
Korku is a language spoken by about 1 million people in India, mostly in the state of Madhya Pradesh. It is a member of the Munda language family, and is closely related to Santali and Mundari.
Both Bhili and Korku are tribal languages, which means that they are spoken by indigenous peoples of India. Tribal languages are often threatened by extinction, as they are spoken by smaller populations and are not as widely used in education and government. However, both Bhili and Korku are still spoken by large numbers of people, and are considered to be vital parts of the cultures of the people who speak them.