The cryoscopic constant value depends upon
The molar mass of the solute in the solution
The explanation for the correct option:
Option (a) The molar mass of the solute in the solution
The explanation for incorrect options:
Option (b) The molar mass of the solvent in the solution
Option (c) The enthalpy of vaporization of the solvent
Option (d) The freezing point of the solvent
Hence, the cryoscopic constant value depends upon the molar mass of the solute in the solution, option (A) is the correct answer.