An electric dipole of moment $\vec{p}$ is placed in an electric field of intensity $\vec{E}$. The dipole acquires a position such that the axis of the dipole makes an angle $\theta$ with the direction of the field. Assuming that the potential energy of the dipole to be zero when $\theta =90^{\circ }$, the torque and the potential energy of the dipole will respectively be:

1. A
   $pE\cos \theta ,-pE\sin \theta$
2. B
   $pE\sin \theta ,-pE\cos \theta$
3. C
   $pE\sin \theta ,-2pE\cos \theta$
4. D
   $pE\sin \theta ,2pE\cos \theta$