Q. Three short dipoles of dipole moment P are arranged as shown below. The electric potential energy of the system is $\left(k=\frac{1}{4{\mathrm{\pi \epsilon }}_0}\right)$


$$\begin{gathered} 1. \frac{k{P}^2}{d^3} \\ 2. \frac{2k{P}^2}{d^3} \\ 3. \frac{3k{P}^2}{d^3} \\ 4. \frac{5k{P}^2}{2d^3} \end{gathered}$$