All these complexes are square planar about `Pt^(II)`.Square planar complexes show geometrical isomerism provided ligands are proper. A bidentate ligand (like ethylenediamine, glycinato) does not attach itself in anti-position. If the ligands present in square planar complexes do not contain chiral or asymmetric center, such complexes do not show optical isomerism due to presence of plane of symmetry.
Optical isomerism is shown by :

Options

A. IV
B. V
C. III
D. none of these

Answer

D

Explanation

III,IV,V are square planar complexes and do not exhibit O.I.