Shown in the figure are two point charges `+Q and -Q` inside the cavity of a spherical shell. The charges are kept near the surface of the cavity on opposite sides of the center of the shell. If `sigma _(1) ` is the surface charge on the inner surface and `Q_(1)` net charge on it and `sigma_(2)` the surface charge on the outer surface and `Q_(2)` net charge on it then

Options

A. `{:(sigma_(1) ne 0"," Q_(1) ne 0), ( sigma _(2) ne 0"," Q_(2) ne 0):}`
B. `{:( sigma _(1) ne 0"," Q_(1) =0),(sigma _(2) ne 0"," Q_(2) =0):}`
C. `{:(sigma _(1) ne 0"," Q _(1) =0),( sigma _(2) =0"," Q_(2) =0):}`
D. `{:(sigma _(1) =0"," Q_(1) =0),( sigma _(2) =0"," Q_(2) =0):}`

Answer

D