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 = (2xy +z^(3))hati + x^(2)hatj +3xz^(2) hatk`
B. `E = 2xy hati +(x^(2) +y^(2)) hatj + (3xz - y^(2))hatk`
C. `E = z^(3) hati +xyzhatj +z^(2) hatk`
D. `E = (2xy - z^(3)) hayi +xy^(2) hatj +3z^(2) xx hatk`