Which of the following complex compound does not show stereoisomerism ?

$\Rightarrow {\left[\mathrm{PdBrCl}\left({\mathrm{NO}}_2\right)\left({\mathrm{NH}}_3\right)\right]}^{-}\text{Hyb. of }{\mathrm{Pd}}^{2+}:{\mathrm{dsp}}^2$ complex has plane of symmetry hence does not exhibit optical isomerism. But it exhibits geometrical isomerism and number of geometrical isomers = 3.
$\Rightarrow \text{ The complex : [ }\mathrm{Zn}\left(\mathrm{SCN}\right)\left({\mathrm{H}}_2\mathrm{O}\right)\text{ (gly)] exhibits optical isomerism }$
Number of stereoisomers = 2
 

$\text{ Hybridization of zinc }:{\mathrm{sp}}^3$
$\left.\Rightarrow \text{ The complex : [ }\mathrm{Co}(\mathrm{acac}{)}_3\right]\text{ exhibits optical isomerism }$
Number of stereoisomers = 2
 

$\Rightarrow \text{ The complex }\left[\mathrm{PtBr}\left({\mathrm{H}}_2\mathrm{O}\right)\left(\text{ en }\right)\right]\text{ does not exhibit geometrical and optical isomerism, because it contains plane of symmetry.}$