The electric potential at a point on the axis of an electric dipole depends on the distance \[r\] of the point from the dipole as [CPMT 1982; UPSEAT 2001 MP PMT 1996, 2002; MP PET 2001, 05]

• A.                    \[\propto \frac{1}{r}\]
• B.                                      \[\propto \frac{1}{{{r}^{2}}}\]
• C.                    \[\propto r\]
• D.                                      \[\propto \frac{1}{{{r}^{3}}}\]