The isomer(s) \( \left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right] \) that has/have a \( \mathrm{…

The isomer(s) \( \left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right] \) that has/have a \( \mathrm{Cl}-\mathrm{Co}-\mathrm{Cl} \) angle of \( 90^{\circ} \), is/are:

[JEE Main 2020, 9 Jan (Shift 2)]