MCQ
Which one of the following complexes will have four isomer
- ✓$[Co(en)(NH_3)_2Cl_2]Cl$
- B$[Co(PPh_3)_2(NH_3)_2Cl_2]Cl$
- C$[Co(en)_3]Cl_3$
- D$[Co(en)_2Cl_2]Br$
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($A$) $\left[\mathrm{Pt}(\mathrm{en})(\mathrm{SCN})_2\right]$
($B$) $\left[\mathrm{Zn}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]$
($C$) $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_4\right]$
($D$) $\left[\mathrm{Cr}(\mathrm{en})_2\left(\mathrm{H}_2 \mathrm{O}\right)\left(\mathrm{SO}_4\right)\right]^{+}$