The correct answer is: a) Indo-Aryan.
Kashmiri is an Indo-Aryan language spoken by about 7 million people in the Indian state of Jammu and Kashmir and the Pakistani-administered territory of Azad Kashmir. It is the official language of Jammu and Kashmir and is also spoken in the Ladakh region of India. Kashmiri is a member of the Indo-Aryan branch of the Indo-European language family. It is closely related to other Indo-Aryan languages such as Hindi, Punjabi, and Urdu.
Tibeto-Burman languages are spoken by about 400 million people in the Himalayas, Southeast Asia, and China. The largest Tibeto-Burman languages are Burmese, Tibetan, and Nepali.
Dravidian languages are spoken by about 250 million people in India, Sri Lanka, and Pakistan. The largest Dravidian languages are Tamil, Telugu, Kannada, and Malayalam.
Austroasiatic languages are spoken by about 100 million people in Southeast Asia, China, and India. The largest Austroasiatic languages are Vietnamese, Khmer, and Mon.