The correct option for the value of vapour pressure of a solution at 45^° C with benzene to octane in molar ratio 3: 2 is: [At 45°C vapour pressure…

The correct option for the value of vapour pressure of a solution at $\displaystyle 45^{\circ} \mathrm{C}$ with benzene to octane in molar ratio $\displaystyle 3$ : $\displaystyle 2$ is : [At $\displaystyle 45$°C vapour pressure of benzene is $\displaystyle 280$ mm Hg and that of octane is $\displaystyle 420$ mm Hg. Assume Ideal gas]