Answer: Option (d) is the correct answer.
Step-by-step explanation:
A volatile solvent will easily change into vapors and therefore, more vapors it will form more will be its vapor pressure.
Whereas a non-volatile solute will not change into vapors easily because it will deposit at the upper surface of the solution due to which solvent particles will not be able to escape into atmosphere. Therefore, they will not generate enough vapors
Hence, a non-volatile solute will lead to decrease in vapor pressure of the solution.
Thus, we can conclude that the vapor pressure of the solvent and the concentration of the (non-volatile) solute particles are the two factors that determine the vapor pressure of a solution containing a non-volatile solute dissolved in a volatile solvent, at a given temperature.