An assertion and a reason are given below.
Assertion: The phenomenon of nuclear fission generates great energy.
Reason: The process in which a nucleus is broken into two parts is called nuclear fission.
Choose the answer.

A

Both Assertion and Reason are true and Reason is the correct explanation of Assertion.

B

Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

C

Both Assertion and Reason are false.

D

Assertion is true but Reason is false.