Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).
Assertion (A): The highest concentration of Seismic zones lies in Himalayan region in India.
Reason (R): There are many longitudinal thrust zones in Himalayas
Codes:

1. A.Both (A) and (R) are true and (R) is the correct explanation of (A)
2. B.Both (A) and (R) are true and (R) is not the correct explanation of (A)
3. C.(A) is true, but (R) is false
4. D.(A) is false, but (R) is true