The complex that shows Facial - Meridional isomerism is:

Options

1. A{ }_{1 .}$\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right]^{+}$
2. B$\left[\mathrm{Co}(\mathrm{en})_3\right]^{3+}$
3. C$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}_3\right]$
4. D\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]^{+}