24 g of AX_2 (molar mass 124 g mol^-1 ) is dissolved in 1 kg of water to form a solution with boiling point of 100.0156^° C, while 25.4 g of AY_2…

$\displaystyle 24$ g of $\displaystyle \mathrm{AX}_2$ (molar mass $\displaystyle 124 \mathrm{~g} \mathrm{~mol}^{-1}$ ) is dissolved in $\displaystyle 1$ kg of water to form a solution with boiling point of $\displaystyle 100.0156^{\circ} \mathrm{C}$, while $\displaystyle 25.4$ g of $\displaystyle \mathrm{AY}_2$ (molar mass $\displaystyle 250 \mathrm{~g} \mathrm{~mol}^{-1}$ ) in $\displaystyle 2$ kg of water constitutes a solution with a boiling point of $\displaystyle 100.0260^{\circ} \mathrm{C}$. $$\mathrm{K}_{\mathrm{b}}\left(\mathrm{H}_2 \mathrm{O}\right)=0.52 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1} $$ Which of the following is correct ?