Which of the following statement(s) is/are correct?

If the electric field due to a point charge varies as $$r^{-25}$$ instead of $$r^{-2}$$, then the Gausslaw will still be valid.

The Gauss law can be used to calculate the field distribution around an electric dipole.

If the electric field between two point charges is zero somewhere, then the sign of the two chargesis the same.

The work doneby the external force in moving a unit positive charge from point A at potential $$V_A$$ to point B at potential $$V_B$$ is $$(V_B - V_A)$$.