The electrostatic potential of a uniformly charged thin spherical shell of charge Q and radius R at a distance `r` from the centre
A. `(Q)/(4 pi epsilon_(0)r)` for points outside and `(Q)/(4pi epsilon_(0)R)` for points inside the shell
B. `(Q)/(4pi epsilon_(0)e)` for both points inside nad outside the shell
C. zero for points outside and `(Q)/(4pi epsilon_(0)r)` for points inside the shell
D. zero for both points inside and outside the shell
