When a non-volatile solute is dissolved in a solvent the relative lowering in vapour pressure is equal to

Question

$\begin{array}{1 1} \text{more fraction of soluent } \\ \text{mole fraction of solution } \\ \text{concentrate of solute in $gl^{-1}$} \\ \text{concentration of solute in g per 100 ml} \end{array}$