In a certain region V= $\;Axy+Bx^2+Cy\;$ where A , B , C are constants . Find electric field as a function of $\;(x ,y ,z)\;.$

Question

$(a)\;(-Ay-2Bx)\;\hat{i}+(Ax+c)\;\hat{j}\qquad(b)\;(Ay+2Bx)\;\hat{i}+c\;\hat{j}\qquad(c)\;(Ay+2Bx)\;\hat{(-i)}+(Ax+c)\;\hat{(-j)}\qquad(d)\;None$