The compound(s) that exhibit(s) geometrical isomerism is(are)

Geometric isomerism is caused by differences in the geometric configuration of the ligands around the central ion. Cis-isomer refers to places where the same kind of ligand is present next to each other.

A trans-isomer is one in which identical ligands are located in places that are in opposition to one another. In coordination complexes with coordination numbers 4 and 6, it occurs frequently.

symmetrical bidentate ligand-containing octahedral complexes of the type $\left[M(AA{)}_2{X}_2\right]\text{ like }{\left[\mathrm{Pt}(en{)}_2{\mathrm{Cl}}_2\right]}^{2+}$ exhibit geometrical isomerism.