Which one of the following 0.06 M aqueous solutions has lowest freezing point?

Given data:
It is given to identify the solution that has lowest freezing point.
Explanation:
$$\begin{gathered} T_f-{}^{\text{'}}T_f=i{K}_f·m \\ For minimum \text{'} Tf \\ \text{ 'i' should be maximum. } \\ {\mathrm{Al}}_2{\left({\mathrm{SO}}_4\right)}_3=5 \\ {\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6=1 \\ \mathrm{Kl}=2 \\ {\mathrm{K}}_2{\mathrm{SO}}_4=3 \end{gathered}$$

Hence, the correct option is option (B) $\mathrm{A}{l}_2{\left({\mathrm{SO}}_4\right)}_3$.