The given complex $\left[\mathrm{Pt}{\left({\mathrm{NH}}_2\right)}_2{\mathrm{Br}}_2\right]$ is a square planar complex and shows geometrical isomerism, i.e. (cis and trans)
(A) $\left[\mathrm{Pt}\left(\mathrm{en}\right){\left(\mathrm{SCN}\right)}_2\right]$  Cannot show geometrical isomerism. 
(B) $\left[\mathrm{Zn}{\left({\mathrm{NH}}_3\right)}_2{\mathrm{Cl}}_2\right]$ is a tetrahedral complex and hence, cannot show geometrical isomerism. 
(C)  $\left[\mathrm{Pt}{\left({\mathrm{NH}}_3\right)}_2{\mathrm{Cl}}_4\right]$ is a octahedral complex and hence, shows geometrical isomerism. 
(D) ${\left[\mathrm{Cr}{\left(\mathrm{en}\right)}_2\left({\mathrm{H}}_2\mathrm{O}\right)\left({\mathrm{SO}}_4\right)\right]}^{+}$ Is an octahedral complex and is of one type. $\left[\mathrm{M}{\left(\mathrm{AA}\right)}_2\mathrm{bc}\right]$  can show  
 Geometrical isomerism.
Where $\mathrm{M}=\mathrm{Cr},\left(\mathrm{AA}\right)=\left(\mathrm{en}\right),\mathrm{b}={\mathrm{H}}_2\mathrm{O}\mathrm{and}\mathrm{c}={\mathrm{SO}}_4$