If degree of dissociation of ${\mathrm{Al}}_2{\left({\mathrm{SO}}_4\right)}_3$ is $25\%$ in a solvent, then

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