Assertion : Ginkgo biloba is living fossil.
Reason : Organisms which have persisted and remain unchanged for the past several million years while their relative disappeared.
A. Both Assertion and Reason are true, but Reason is the correct explanation of Assertion
B. Both Assertion and Reason are true, but Reason is not the correct explanation of Asseration
C. Assertion is true, but Reason is false
D. Asseration is false , but Reason is true