What is the behavior of conductors in the electro static fields ?
$\begin{array}{1 1} \text{(a) Charge always resides in the interior of the conductor} \\ \text{(b) Electric potential is constant for entire conductor} \\ \text{(c)Net electric field intensity in the interior of a conductor is non zero } \\\text{(d)Electric field just outside the charged conductor to the surface }\end{array} $