(A) Cell constant =AIm−1 (B) Molar conductivity (λm)=molarityκ×1000Scm2mol−1 (C) Conductivity (κ)=ρ1=RA1Ω−1m−1 (D) Degree of dissociation of electrolyte = Number of moles dissociated out of one mole. It is a ratio. Hence, it is dimensionless. Thus, the correct match is A → 3, B → 1, C → 4, D → 2.