Arunachal Pradesh is dominated by the speakers of _____ family of Indian language.

Sino-Tibetan

The correct answer is Option (3) → Sino-Tibetan

Arunachal Pradesh, a north-eastern state of India, is known for its linguistic diversity, with a significant dominance of languages from the Sino-Tibetan language family. The Sino-Tibetan language family is one of the world's largest and most diverse language families. It encompasses a wide range of languages spoken across East and Southeast Asia.