Which of the following is not true?

(a) At large distances, the electric dipole potential varies as 1/r.
(b) Electrostatic potential varies as 1/r for a point charge.
(c) The potential depends on the magnitude of position vector ans dipole moment vector for a dipole.
(d) The electrostatic field varies as 1/r2 for a point charge.

Answer: (a) At large distances, the electric dipole potential varies as 1/r.