Question

In which of the following compounds tautomerism is possible?

• A.
• B.
• C.
• D.

Answer 1

The correct option is A

Condition for tautomerism : Carbonyl compound having an ⍺-H atom at its $s{p}^3$ hybridised ⍺-C atom.
Keto form is possible only for phenol. Hence option 'a' is correct.