The largest tribal group in Mizoram is the:

Lushai
Chakma
Hmar
Reang

The correct answer is: a) Lushai.

The Lushai are the largest tribal group in Mizoram, India. They are also known as the Mizos. The Lushai are a Sino-Tibetan people who speak the Lushai language. They are traditionally a matrilineal society, with property and inheritance passing down through the female line. The Lushai are known for their traditional music and dance, as well as their unique system of social organization.

The Chakma are the second largest tribal group in Mizoram. They are a Buddhist people who speak the Chakma language. The Chakma are originally from the Chittagong Hill Tracts in Bangladesh. They were displaced from their homeland in the 1980s and 1990s due to conflict between the Bangladesh government and the Shanti Bahini, a Chakma rebel group. Many Chakma now live in Mizoram, as well as in other parts of India and Bangladesh.

The Hmar are a Christian people who speak the Hmar language. The Hmar are originally from the Chin Hills in Myanmar. They were displaced from their homeland in the 19th century due to conflict between the British and the Burmese. Many Hmar now live in Mizoram, as well as in other parts of India and Myanmar.

The Reang are a Hindu people who speak the Reang language. The Reang are originally from the Chittagong Hill Tracts in Bangladesh. They were displaced from their homeland in the 1980s and 1990s due to conflict between the Bangladesh government and the Shanti Bahini, a Chakma rebel group. Many Reang now live in Mizoram, as well as in other parts of India and Bangladesh.