The electirc potential at a point `(x, y, z)` is given by
`V = -x^(2)y - xz^(3) + 4`
The electric field `vecE` at that point is
A. `E =hat(i)(2xy+z^(3))+hat(j)x^(2)+hat(k)3xz^(2)`
B. `E=hat(i)2xy+hat(i)(x^(2)+y^(2))+hat(k)(3xz-y^(2))`
C. `E=hat(i)z^(3)+hat(j)xyz+hat(k)z^(2)`
D. `E=hat(i)(2xy-z^(3))+hat(j)xy^(2)+hat(k)3z^(2)x`