Match the following aqueous solutions with the appropriate letter from the column on the right.

$x,1\mathrm{.}0\mathrm{.}18mCa{I}_2$

A$.$ Highest boiling point

$2.0\mathrm{.}15mN{a}_{2}C{O}_3$

B$.$ Second highest boiling point

x $3\mathrm{.}0\mathrm{.}17mNiB{r}_2$

C$.$ Third highest boiling point

X $4.0\mathrm{.}48m$ Ethylene glycol $($nonelectrolyte$)$

D$.$ Lowest boiling point