A
dance forms of Northwest India
B
musical instruments
C
pre-historic cave paintings
D
tribal languages
Correct answer: (d) tribal languages
Explanation
- A
dance forms of Northwest India
Dance of the Northwest. Wrong family and region.
- B
musical instruments
Musical instruments. They are languages.
- C
pre-historic cave paintings
Cave paintings. Unrelated.
- D
tribal languages
Tribal languages. Halbi, Ho and Kui — central Indian / Odisha–Chhattisgarh–Jharkhand tongues.
Summary. Official key is (d) tribal languages. Halbi (Bastar), Ho (Kolhan) and Kui (Kandha, Odisha) are scheduled/tribal languages, not dances, instruments or paintings.