Question $17$

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Which one of the following complexes can exhibit geometrical isomerism?

Select one:

a$.Zn(NH3)2Cl2($tetrahedral$)$

b$.[Co(NH3)5Cl]2+($octahedral$)$

c$.[Cu(NH3)4]2+($square planar$)$

d$.Pt(NH3)2Cl2($square planar$)$