Identify ' $B$ ' in the following reaction $\begin{aligned} & \mathrm{CH}_2=\mathrm{CH}_2+\mathrm{HCl} \stackrel{\text { anhy } \cdot \mathrm{AlCl}_3}{\longrightarrow} A+2[\mathrm{H}] \\ & \stackrel{\mathrm{Zn}-\mathrm{Cu}}{\underset{\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}}{\longrightarrow}} \mathrm{B}+\mathrm{HCl}\end{aligned}$

• A

  $\mathrm{CH}_4$
• Correct answer
  B

  $\mathrm{C}_2 \mathrm{H}_6$
• C

  $\mathrm{C}_2 \mathrm{H}_5 \mathrm{Cl}$
• D

  $\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}$

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