Identify $A$ and $B$ in the following reactions

• A

  $A=\mathrm{C}_2 \mathrm{H}_2, B=\mathrm{C}_2 \mathrm{H}_6$
• B

  $A=\mathrm{C}_2 \mathrm{H}_5 \mathrm{Cl}, B=\mathrm{C}_2 \mathrm{H}_4$
• C

  $A=\mathrm{C}_2 \mathrm{H}_4, B=\mathrm{C}_2 \mathrm{H}_5 \mathrm{Cl}$
• Correct answer
  D

  $A=\mathrm{C}_2 \mathrm{H}_5 \mathrm{Cl}, B=\mathrm{C}_2 \mathrm{H}_5 \mathrm{Cl}$

Solution

Ethyl chloride can be converted into ethanol either by its alkaline hydrolysis or by its reaction with moist $\mathrm{AgOH}$.

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