A stone tied to a string rotated with uniform speed in a vertical plane. If the mass of the stone is m, length of string is r and the speed of the stone is v, the tension in the string when the stone is at its lowest point is (g = acceleration due to gravity

Options

A. mg
B. `frac(mv^2)(r)`
C. `frac(mv^2)(r)-mg`
D. `frac(mv^2)(r)+mg`