Assertion (A) : The Himalayan soils are rich in humus. Reason (R) : The Himalayas have the largest area under forest cover. Codes :

• A. (A) Both (A) and (R) are true and (R) is the correct explanation of (A)
• B. (B) Both (A) and (R) are true but (R) is not the correct explanation of (A)
• C. (C) (A) is true but (R) is false
• D. (D) (A) is false but (R) is true