Which of the following statements regarding Himalayas are correct?

I. Himalayas are geologically young and structurally fold mountains.

II. They are wide in Kashmir and narrow in the North-eastern states.

III. The folds of Great Himalayas are asymmetrical in nature and their core is composed of granite.

IV. The longitudinal valleys lying between Greater and Lesser Himalayas are known as Duns.

Select the correct answer using the codes given below:

The correct answer is I, II, III and IV

 Key Points

• The Himalayas were formed due to the tectonic collision between the Indian Plate and Eurasian Plate.
• The term Duns refers to the longitudinal valleys found in the outer foothills of the Himalayas, between the Greater Himalayas and Lesser Himalayas.
• The Great Himalayas contain some of the highest peaks in the world, and their formation and structure are crucial to understanding the tectonic history of the region.

Additional Information

• The Himalayan mountain range has a profound impact on the climate and biodiversity of the region, serving as a natural barrier to the monsoon winds from the south.
• These valleys (Duns) are not only important geographically but have also been historically significant in terms of human settlement, agriculture, and trade routes.