Electric potential is given by $\;V=2x^2\;$ Find the electric field at $\;(1 ,0 ,2)\;$ in Volt/metre.

Question

$(a)\;4 \hat{i}\qquad(b)\;-4 \hat{i}\qquad(c)\;8 \hat{i}\qquad(d)\;-8 \hat{i}$