A uniform rod of legth `L` is free to rotate in a vertica plane about a fixed horizontal axis through `B`. The rod begins rotating from rest. The angular velocity `omega` at angle `theta` is given as

A. `sqrt(((6g)/(L)))sin((theta)/(2))`

B. `sqrt(((6g)/(L)))cos((theta)/(2))`

C. `sqrt(((6g)/(L)))sintheta`

D. `sqrt(((6g)/(L)))costheta`