The electric potential V at any point (x,y,z) in space is given by $V= gx^2\; volt$. Electric field at $ (2,0,5) m $ in $Vm^{-1}$ is :

Question

$(A)\;36, along\;+ve \; x-axis \\ (B)\;36, along\;-ve \; x-axis \\ (C)\; 90, along\;+ve \; z-axis \\ (D)\;90, along\;-ve \; z-axis $