Question

The mountain ranges that form the boundary with Myanmar in the eastern part of India are collectively known as _
A) Purvanchal
B) Himachal
C) Uttaranchal
D) None of these

Answer 1

Hint:
This Mountain range along the eastern part of India is a sub-mountain range of Himalaya, covering an area of about 94,800 km2 with a population of over four million. It includes the population of Nagaland, Manipur, Tripura and Mizoram Hills and Chachar Districts.

Complete solution:
This eastern frontier region of India is surrounded by Bangladesh in the south-west. In the south-east face surrounded by Myanmar and China in the north-east. This range lies in northeastern India. It is an eastern extension of the Himalayan Range System. On crossing the location of Dihang River gorge, this range bends sharply to the south and spreads along the eastern boundary of India with Myanmar.

These mountains are composed of sedimentary rock. They are covered with thick forests.
Major Hills in the Eastern range:
This range consists of 12 major hills. They are Dafla Hills, Abor Hills, Mishmi Hills, Patkai Bum Hills, Naga Hills, Manipur Hills, Mizo Hills, Tripura Hills, Mikir Hills, Garo Hills, Khasi Hills and Jaintia Hills.
Mountain ranges in the eastern part of India forming its boundary with Myanmar are collectively known as Eastern hills or Purvanchal hills.

Hence, the correct answer is option A.

Note:
Purvanchal acts as a natural frontier of India with countries like Burma etc. Rivers of this region provide a good place for huge hydroelectric power. The winds coming from the Northeast get trapped by this range of mountains, which provides heavy rainfalls to the Northeast states. It is the main attraction for tourists.