Liquid Solution

For two pure volatile liquids X and Y, attractive intermolecular interactions of both X-X and Y-Y are weaker than those of X-Y. The total vapour pressure of an equimolar solution of X and Y is $p_{total}$. The vapour pressure of pure X and pure Y are $p^0_X$ and $p^0_Y$, respectively. Which one of the following relations is correct?