In the following reaction,
$$ \text { The structure of the major product } X \text { is } $$

• A

  
  
• Correct answer
  B

  
  
• C

  
  
• D

  < smiles>O=C(Nc1cccc([N+](=O)[O-])c1)c1ccccc1 < /smiles>

Solution

Ring 1 is more active, electrophilic substitution takes place over ring 1. - $\mathrm{NH}-\mathrm{C}-\mathrm{Ph}$ is ortho-para directing, para product is predominating.

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