The correct option is A 256 S,0 S,97 S,404 S
Coordination number of Pt is 6. Hence on aqueous solution the number of dissociated ions will be
I K2[PtCl6] − Three ions
II [Pt(NH3)2Cl4] − Zero ions
III [Pt(NH3)3Cl3]Cl− Two ions
IV [Pt(NH3)5Cl]Cl3 − Four ions
More is the number of ions, more is the electrical conductance. Thus (A) is the correct option here.