Explanation: The Himalayas bend sharply to the south beyond the Dihang gorge and move outwards to form a covering the eastern boundary of the country.

• They are known as ‘the Eastern or Purvanchal Hills’. It extended in the north-eastern states of India.
• Most of these hills are extended along the border of India and Myanmar while others are inside India namely- the Patkai Bum Hills, the Naga Hills and the Mizo Hills.

Source: NCERT – India Physical Environment