Explanation:

The Santal or Santhal, are a Munda ethnic group native to India and Bangladesh. Santals are the largest tribe in the Jharkhand state of India in terms of population and are also found in the states of Assam, Tripura, Bihar, Chhattisgarh, Odisha and West Bengal. They are the largest ethnic minority in northern Bangladesh's Rajshahi Division and Rangpur Division. They have a sizeable population in Nepal and Bhutan. The Santals speak Santali, the most widely spoken of the Munda languages.According to linguist Paul Sidwell, Austro-Asiatic language speakers probably arrived on coast of Odisha from Indochina about 4000–3500 years ago. The Austroasiatic speakers spread from Southeast Asia and mixed extensively with local Indian populations. The original homeland of the Santals was in the southeast of the Chota Nagpur plateau, modern-day southern Jharkhand and northern Odisha, and the Mendinpur district of southern West Bengal. Here they developed wet-rice agriculture.