Physics · JEE | Electrostatic Potential and Capacitance

What is the electrostatic potential energy of a system of two point charges \( q_1 \) and \( q_2 \) separated by distance \( r_{12} \) in free space?

1. A
   \( q_1 V(\mathbf{r}_1) + q_2 V(\mathbf{r}_2) \)
2. B
   \( \frac{1}{4\pi\varepsilon_0}\frac{q_1 q_2}{r_{12}^2} \)
3. C
   \( \frac{1}{4\pi\varepsilon_0}\frac{q_1 q_2}{r_{12}} \)
4. D
   \( \frac{1}{4\pi\varepsilon_0}\frac{q_1 + q_2}{r_{12}} \)