The force on a point charge +q kept at a distance d from the surface of an infinite grounded metal plate in a medium of premittivity $$\epsilon$$ is

A

0

B

$$\frac {q^2}{16 \pi \epsilon d^2}$$ away from the plate

C

$$\frac {q^2}{16 \pi \epsilon d^2}$$ towards the plate

D

$$\frac {q^2}{4 \pi \epsilon d^2}$$ towards the plate