Explanation:

Both A and R are true but R is not the correct explanation of A.

The Himalayas play a very important role in influencing the climate of India. India is a monsoon land only because of the presence of Himalayas. It traps the monsoon winds from Arabian sea and Bay of Bengal and forces them to shed their moisture content within the Indian sub-continent in the form of snow and rain. It also blocks the cold winter storms of East Asia from entering India, thus protecting us from severe cold.