Step 1: Understanding the Concept:
The question requires identifying which of the listed Indian tribes belong to the same major language family. The primary language families for tribal groups in India are Dravidian, Austroasiatic, and Tibeto-Burman.
Step 2: Detailed Explanation:
Let's identify the linguistic affiliation of each tribe:
- A. Chenchus: This tribe resides in the states of Andhra Pradesh and Telangana. They speak the Chenchu language, which is a member of the Dravidian language family.
- B. Mikir (Karbi): This tribe is primarily found in Assam. They speak the Karbi language, which belongs to the Tibeto-Burman branch of the Sino-Tibetan language family.
- C. Kadar: This tribe lives in the states of Kerala and Tamil Nadu. Their language, Kadar, is classified as a Dravidian language.
- D. Koraga: This tribe is found in Karnataka and Kerala. The Koraga language is also a member of the Dravidian language family.
Step 3: Final Answer:
The Chenchus, Kadar, and Koraga tribes all speak languages belonging to the Dravidian family. The Mikir tribe speaks a Tibeto-Burman language. Therefore, A, C, and D share the same linguistic group.