The expression connecting molar and equivalent conductivities is

where ${\mathrm{v}}_{+}$ is the stoichiometric number of the cation and ${\mathrm{z}}_{+}$ is its charge number in the compound

The expression connecting molar and equivalent conductivities is $A_m=A_{eq}{V}_{+}{z}_{+}$

Equivalent conductivity refers to the electrical resistance of a volume of solution having one equivalent of an electrolyte. Molar conductivity is the property of conductance of a solution containing one mole of electrolyte, or a result of the ionic strength or salt content of a solution..

Hence option B is correct