$\mathrm{CaOCl}_2+\mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{Ca}\left(\mathrm{OH}_2+X\right.$ $\begin{aligned} X+\mathrm{CH}_3 \mathrm{CHO} & \longrightarrow Y \\ Y+\mathrm{Ca}(\mathrm{OH})_2 & \longrightarrow \mathrm{CHCl}_3 .\end{aligned}$ What is ' $Y$ '?

• A

  $\mathrm{CH}_3 \mathrm{CH}(\mathrm{OH})_2$
• B

  $\mathrm{CH}_2 \mathrm{Cl}_2$
• Correct answer
  C

  $\mathrm{CCl}_3 \mathrm{CHO}$
• D

  $\mathrm{CCl}_3 \mathrm{COCH}_3$

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