NEET 2022 Biology question

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 :

• (A)(A) is not correct but (R) is correct
• (B)Both (A) and (R) are correct and (R) is the correct explanation of (A)
• (C)Both (A) and (R) are correct but (R) is not the correct explanation of (A)Correct
• (D)(A) is correct but (R) is not correct