Selectable Markers I

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)

Assertion (A):	Polymerase chain reaction is used in DNA amplification.
Reason (R):	The ampicillin resistant gene is used as a selectable marker to check transformation.

In the light of the above statements, choose the correct answer from the options given below:

1.	(A) is False but (R) is True.
2.	Both (A) and (R) are True and (R) is the correct explanation of (A).
3.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
4.	(A) is True but (R) is False.