The electric field and the electric potential at a point are E and V respectively

Question

$(a)\;If\;E=0 ,\;V \;must\;be\;zero\qquad(b)\;If\;V=0 ,\;E \;must\;be\;zero\qquad(c)\;E=0 ,\;V \;cant\;be\;zero\qquad(d)\;None$