The Correct Answer is Outer Himalayas.

• The Sivalik Hills are a mountain range of the outer Himalayas.
• It stretches from the Indus River about 2,400 km eastwards close to the Brahmaputra River, spanning across the northern parts of the Indian subcontinent.

• The Shiwaliks or Outer Himalayas
  • The Shiwaliks extend from the Jammu Division of Jammu and Kashmir State to Assam.
  • In width, Shiwaliks vary from 8 km in the east to 45 km in the west with an average elevation of about 1000- 1500 m above sea level.
  • It is not a continuous range.

• The Himalayas may be divided into the following four divisions from north to south:
• The Trans-Himalayas
  • The Trans-Himalayas is about 40 km wide. They contain the Tethys sediments
• The Greater Himalayas
  • The Greater Himalayas rise abruptly like a wall north of the Lesser Himalayas.
  • The Main Central Thrust separates the Greater Himalayas from the Lesser Himalayas.
  • The Greater Himalayas are about 25 km wide with an average height above 6100 meters.
  • Almost all the lofty peaks of the Himalayas Mb Everest, Kanchanjunga, Nanga-Parbat, Gasherbrum, Manaslu, Dhaulagiri, Annapurna, Gosainthan, Cho-Cyu, Nanda-Devi, Kamet, Badrinath, etc. Nanda Devi, etc., lie in this zone.
• The Lesser Himalayas
  • The width of the Lesser Himalayas is about 80 km with an average height of 1300-4600 m.It is divided into Pir Panjal range and Dhauladhar range. Important places are Kullu Manali,Shimla etc.
• The Shiwaliks or Outer Himalayas