Which of the following statement(s) is (are) correct for solid ${\mathrm{ICl}}_3$ molecule (it is ${\mathrm{I}}_2{\mathrm{Cl}}_6$ in solid state)?

 

The structure of ${\mathrm{I}}_2{\mathrm{Cl}}_6$ can be given as,

The shape of this molecule is Planar as all atom do lie in one plane. Here, all I-Cl bond lengths are not equal

There are two three center four electron bonds i.e.  $3\mathrm{c}-4\mathrm{e}$ bonds. So, the option A, C and D are correct.