The correct answer is: c) Sino-Tibetan family.
Arunachal Pradesh is home to a large number of languages and dialects belonging primarily to the Sino-Tibetan family. This family includes languages spoken in Tibet, China, Myanmar, and India. The Sino-Tibetan languages are thought to have originated in the Tibetan Plateau, and they are characterized by their use of tones and their complex grammar.
The Indo-Aryan languages are a branch of the Indo-European language family. They are spoken in India, Pakistan, Bangladesh, Nepal, Sri Lanka, and Afghanistan. The Indo-Aryan languages are thought to have originated in the Indus Valley, and they are characterized by their use of a complex system of verb conjugations.
The Dravidian languages are a family of languages spoken in southern India and Sri Lanka. The Dravidian languages are thought to have originated in the Indian subcontinent, and they are characterized by their use of a complex system of noun declensions.
The Austroasiatic languages are a family of languages spoken in Southeast Asia, India, and China. The Austroasiatic languages are thought to have originated in Southeast Asia, and they are characterized by their use of a complex system of noun classes.