Consider the following reactions,
$A$ and $B$ are

• A

  $A=\mathrm{C}_2 \mathrm{H}_4, B=\mathrm{C}_6 \mathrm{H}_6$
• B

  $A=\mathrm{C}_2 \mathrm{H}_6, B=\mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2$
• C

  $A=\mathrm{C}_2 \mathrm{H}_4, B=\mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2$
• Correct answer
  D

  $A=\mathrm{C}_6 \mathrm{H}_6, B=\mathrm{C}_6 \mathrm{H}_5 \mathrm{NO}_2$

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