The correct answer is Purvanchal. Explanation & Key Takeaways: • The Purvanchal range includes the mountain ranges of the Patkai hills, the Barail range, Manipur, and Naga Hills. • Purvachal, also called the Eastern Highlands, mountain range in eastern India. They extend over an area of about 37,900 square miles (98,000 square km) in Arunachal Pradesh, Nagaland, Manipur, Mizoram, Tripura, and eastern Assam states. • The area is bounded by Bangladesh to the southwest, Myanmar (Burma) to the southeast, and China to the northeast. The Hindu epic the Mahabharata has several references to the region. • Purvanchal range bends sharply to the south beyond the Dihang River gorge and spreads along the eastern boundary of India with Myanmar. • The Purvachal was ruled by the Ahoms from the beginning of the 13th century. It was occupied by the British in the last quarter of the 19th century.