What is the behavior of  conductors in the electro static fields ? 

Question

What is the behavior of  conductors in the electro static fields ? 

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