The bob of a simple pendulum it displaced position `O` to a equilibrium position `Q` which is at height h above `O` and the bob to then mass released Assuming the mass of the bob is m and time period `2.0` sec of oscillation to be string when the bob passes through `O` is
A. `m(g+pisqrt(2gh))`
B. `m(g+sqrt(pi^(2)gh))`
C. `m(g+sqrt(pi^(2)/(2)gh))`
D. `m(g+sqrt(pi^(2)/(3)gh))`