Question

The tautomer of $II$ is :

• A. $I$
• B. $III$
• C. Both $I$ and $III$
• D. None of the above

Answer 1

The correct option is C Both $I$ and $III$

Both $I$ and $III$ are tautomers of $II$ as shown :

Enol form i.e. $II$ is the most stable because it is aromatic compound.