A point Q lies on the perpendicular bisector of an electrical dipole of dipole moment p. If the distance of Q from the dipole is r (much larger than the size of the dipole), then the electric field at Q is proportional to :

Question

$\begin{array}{1 1} (1)\; \text{$p^2$ and $r^{–3}$} \\ (2)\; \text{$p$ and $r^{–2}$} \\ (3)\; \text{$p^{–1}$ and $r^{–2}$} \\ (4)\; \text{$p$ and $r^{–3}$} \end{array}$