(A) : When a girl sitting on a swing stands up, the periodic time of the swing will decrease.
(R): In standing position of girl, the length of the swing will increase.

Options

A. Both 'A' and 'R' are true and R' is the correct explanation of 'A'
B. Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A'
C. A' is true and 'R' is false
D. A' is false and 'R' is true

Answer

C