Answer
d)Molar conductivity of a strong and weak electrolyte increases with dilution
Molar conductivity of both weak and strong electrolytes increases as the total volume of solution containing 1 mol of electrolyte increases.
On dilution the volume of solution increases. In case of weak electrolyte, dilution leads to better dissociation of electrolyte into ions by Ostwald dilution theory which leads to an increase in molar conductivity.