##### 55. If $E=-(2y^3-3yz^2)\hat x-(6xy^2-3xz^2)\h... 55. If \(E=-(2y^3-3yz^2)\hat x-(6xy^2-3xz^2)\hat y+(6xyz)\hat z$ is the electric field in a source free region, a valid expression for the electrostatic potential is

(A) xy3-yz2

(B) 2xy3-xyz2

(C) y3+xyz2

(D) 2xy3-3xyz2

Hint:

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