Electrostatics: JEE Main 2025 Physics question

Two point charges $-4\ \mu\mathrm{c}$ and $4\ \mu\mathrm{c}$, constituting an electric dipole, are placed at $(-9, 0, 0)$ cm and $(9, 0, 0)$ cm in a uniform electric field of strength $10^4\ \mathrm{N\,C^{-1}}$. The work done on the dipole in rotating it from the equilibrium through $180^\circ$ is: