The inward and outward electric flux for a closed surface in units of `Nm^2` /C are respectively `8 xx10^3` and `4 xx10^3` . Then the total charge inside the surface is ........... c.
Options:
(a) `(–4 xx10^3)/(epsilon_o)`
(b) `–4xx 10^3`
(c) `4 xx10^3`
(d) `–4 xx10^3epsilon_o`