$\begin{array}{1 1}\text{the lowering of vapour pressure is equal to the mole fraction of solute}\\\text{the relative lowering of vapour pressure is equal to the mole fraction of solute}\\\text{the relative lowering of vapour pressure is proportional to the amount of solute in the solution}\\\text{the vapour pressure of the solution is equal to the mole fraction of solvent}\end{array} $
