Which is the oldest mountain range in India?
(A) The Himalayas
(B) The Aravallis
(C) The Vindya
(D) The Satpura

Hint: A mountain is an elevated part of the Earth’s surface with a steep slope and a conical shape. A series of mountains arranged in a line is known as a mountain range. A number of mountains ranges together form a mountain system.

Complete step by step solution:
Depending on how long ago they were formed, mountains can be classified as young and old mountains. Old mountains are much lower in height in comparison to young mountains as they get worn down by the forces of nature such as wind, water, and ice, over time. Old mountains have rounded peaks and gentle slopes.
In India Aravallis mountains range is the largest old mountain. Aravallis mountain is a type of fold mountain. It is situated in the Northwest part of India extending upto south west direction. Guru Shikhar is the highest peak in the Aravalli mountain range.

So the correct answer is (B).

Additional Information:
Mountains are useful in a following ways:
They are storehouses of water. Many mountains have frozen rivers of ice, or glaciers. Many perennial rivers originate from such glaciers.
Dams and reservoirs are often built on rivers to provide water to people and farms.
Water from water is also used to generate electricity.
Mountains are home to a rich variety of animals and plant life.

Note: Young mountains are generally quite tall. They have pointed peaks, steep slopes,and deep valleys. The Himalayas, the Rockies, and the Alps are young fold mountains. Young mountains are still continuing growing.