Conditions of geometrical isomerism: In order to represent the geometrical isomerism by the compound, the two groups should be different lies at each stereo centre, in which geometrical isomerism is observed. (a) Crotonic acid
(b) Citraconic acid
(c) Cis-platin
(d) Butanone-2
In these compounds, Cis-platin does not show geometrical isomerism. Thus, the option (c) is correct.