Explanation:

 Kacharis are the most widespread tribe of Northeast India. The Kachari denotes tribes like Bodo, Dimasa, Chutiya, Sonowal, Hajong, Lalung (Tiwa), Rabha, Garos and Tripura tribes (Debbarmas, Reangs, Jamatia) which have their common origin. They are considered to have reached the Brahmaputra valley via Tibet and settled in the foothills of the eastern Himalayan range which includes the whole of Assam, Tripura, North Bengal, mostly Garo Hills part of Meghalaya, some in Bhutan and Arunachal Pradesh, Historic Dimapur of Nagaland, and parts of Bangladesh. They may also found in Jiribam region of Manipur and Hills of Mizoram, there known as Bru (Reang), a sub-tribe of Tiprasa (Tripuri).