A potential field is given by $$\phi = 2 xy^2 - 3 y^2z$$. If $$\hat{x}, \hat{y}, \hat{z}$$ are the unit vectors along x, y and z directions respectively, the field intensity at (0, 1, 0) is:

A

0 V/m

B

$$2 \hat{x} - 3 \hat{z}$$

C

$$-2 \hat{x} + 3 \hat{z}$$

D

$$2 \hat{x} + 3 \hat{z}$$