Select the correct statements regarding ${\left.[\text{ Pten)(pn)Cl }{]}_2\right]}^{2+}$ion.

In the given ion,

${\left[\mathrm{Pt}\left(\mathrm{en}\right)\left(\mathrm{pn}\right){\mathrm{Cl}}_2\right]}^{2+}:{\mathrm{Pt}}^{4+}:5d^6:d^{2}s{p}^3$(unpaired electrons are zero)

Here, both geometrical isomers are optically active.

Hence correct option is (a, b, c, d).