(A): Centrifugal force is reactionary force of centripetal force
(R): A simple pendulum is oscillating in vertical plane then mean position net force on pendulum is zero.
A. If both A and R are true and R is the correct explanation of A
B. If both A and R are true but R is not correct explanation of A
C. If A is true but R is false
D. If A is false but R is true
