Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A): Vincristine and Reserpine are indole alkaloids.
Reason (R) : Tyrosine and Phenylalanine are the precursors for synthesis of Indole alkaloids.
In the light of the above statements, choose the most appropriate answer from the options given below.