# Molar conductivity of transition metal complexes solutions [closed]

Which of the following has the highest molar conductivity?

(A) Diaminedichloroplatinum(I)
(B) Tetraamminedichlorocobalt(III) chloride
(C) Potassium hexacyanoferrate(II)
(D) Hexaaquochromium(II) bromide

Since mobility depends on the size, charge and the number of particles, how can we determine the extent of molar conductivity from the given data?

The solution provided to me considered only the number of ions that each gives. But is this justified? Because they all have different sizes, charges and thus different mobility.

$$\ce{K4[Fe(CN)6] <=> 4 K+ + [Fe(CN)6]^{4-}}$$