Vapour phase diagram for a solution is given below if dotted line represents deviation

 

Correct observation for this solution

 

A mixture of two liquids$\mathrm{A}$and$\mathrm{B}$ having boiling point of $\mathrm{A}$ is $70°\mathrm{C}$, and boiling point of $\mathrm{B}$ is $100°\mathrm{C}$, distills at $101.2°\mathrm{C}$ as single liquid, hence this mixture is

Vapour pressure diagram of some liquids potted against temperature are show below

Most volatile liquid

Two solutions marked as$\mathrm{A}$ and $\mathrm{B}$are separated through semipermeable membrane as below. The phenomenon undergoing

Correct observation

The phenomenon taking place