If boiling point of an aqueous solution is 100.1$^{\large\circ}C$,what is its freezing point.Given,latent heat of fusion and vaporization of water as $80cal g^{-1}$ and $540cal g^{-1}$ respectively.

Question

$\begin{array}{1 1}-0.361^{\large\circ}C\\-0.461^{\large\circ}C\\-0.561^{\large\circ}C\\-0.661^{\large\circ}C\end{array} $