$2.0$ molal aqueous solution of an electrolyte ${\mathrm{X}}_2{\mathrm{Y}}_3$ is $75\mathrm{\%}$ ionised. The boiling point of the solution a $1\mathrm{ }\mathrm{a}\mathrm{t}\mathrm{m}$ is $\left({\mathrm{K}}_{\mathrm{b}\left({\mathrm{H}}_2\mathrm{O}\right)}=0.52\mathrm{ }\mathrm{K}\mathrm{ }\mathrm{ }\mathrm{k}\mathrm{g}\mathrm{ }\mathrm{ }\mathrm{m}\mathrm{o}{\mathrm{l}}^{-1}\right)$

• A

  $274.76\mathrm{ }\mathrm{K}$
• B

  $377\mathrm{ }\mathrm{K}$
• C

  $376.4\mathrm{ }\mathrm{K}$
• Correct answer
  D

  $377.16\mathrm{ }\mathrm{K}$

Hence, the correct answer is option: 'D'.