For a charged hollow metallic sphere, excess charge is confined to the outer surface. Gauss's law dictates that the electric field within a conductor or hollow cavity is zero:
\[
E = 0 \quad \text{(inside the shell)}
\]
Nevertheless, the electric potential inside is constant and matches the surface potential:
\[
V = V_0 eq 0
\]
Consequently, while there is no internal electric field, the potential is non-zero and uniform throughout the interior.
% Final Answer Statement
Answer: \( \boxed{\text{(B)} \ E = 0, \ V = V_0} \)