Physics · JEE | Electrostatic Potential and Capacitance

What is the potential energy \( U(\theta) \) of an electric dipole of dipole moment \( \mathbf{p} \) in a uniform electric field \( \mathbf{E} \), taking zero potential energy at \( \theta = \pi/2 \)?

1. A
   \( \mathbf{p} \cdot \mathbf{E} \)
2. B
   \( -\mathbf{p} \cdot \mathbf{E} \)
3. C
   \( pE \sin\theta \)
4. D
   \( -pE \sin\theta \)