The vapour pressure of the solution of two liquids $\mathrm{A}({\mathrm{p}}^{\mathrm{o}}=80\text{ mm})$ and $\mathrm{B}({\mathrm{p}}^{\mathrm{o}}=120\text{ mm})$ is found to be 100 mm when ${\mathrm{X}}_{\mathrm{A}}=0.4$. The result shows that

solution exhibits ideal behaviour

solution shows negative deviations

Deviations is independent of vapour pressures of liquids

solution shows positive deviations