A stone attached to a string is rotated in a vertical circle such that when it is at the top of the circle its speed is `V` and there is neither tension nor slacking in the string. The speed of stone when its angular displacement is `120^@` from the lowest point is
A. `(3)/(2) V`
B. `sqrt(2) V`
C. `sqrt(3) V`
D. `sqrt((3)/(2)) V`