Which of the following statements is incorrect?

$\left[{\mathrm{NiBr}}_2{\left({\mathrm{PEt}}_3\right)}_2\right]\text{ and }\left[\mathrm{Cu}{\left({\mathrm{NH}}_3\right)}_4\right]{\left({\mathrm{NO}}_3\right)}_2$ have the same geometry and magnetic properties since there are the same number of unpaired electrons.

${\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_2{\mathrm{Cl}}_2\left(\mathrm{en}\right)\right]}^{+}$can have total five stereo isomeric forms.

Due to structural isomer -1's plane of symmetry (ionization/isomer), there are no optical isomers.

${\left[{\mathrm{CoCl}}_3{\left({\mathrm{NH}}_3\right)}_3\right]}_{{\mathrm{NH}}_3}$Geometrical - 2 (lix se frans)

Total number of isomer is:2+1= 3