Q. Consider the following statements:

1. The Himalayan Mountains and the Alps are young fold mountains.
2. The Aravali range in India is one of the oldest fold mountain systems in the world.
3. The Appalachians in North America and the Ural mountains in Russia are very old fold mountains.

Which of the above is / are correct?
Answer: 1, 2 & 3
Notes: The Himalayan Mountains and the Alps are young fold mountains with rugged relief and high conical peaks. The Aravali range in India is one of the oldest fold mountain systems in the world. The range has considerably worn down due to the processes of erosion. The Appalachians in North America and the Ural mountains in Russia have rounded features and low elevation. They are very old fold mountains.