question_answer

A given nitrogen - containing aromatic compound A reacts with Sn⁄HCl, followed by \[HN{{O}_{3}}\]to give an unstable compound B.B, on treatment with phenol, forms a beautiful coloured compound C with the molecular formula \[{{C}_{12}}{{H}_{10}}{{N}_{2}}O\]. The structure of compound A is

A)                   

B)  

C)                  

D)  

Correct Answer: D

Solution :