question_answer

Given,                                                                                                    Which of the given compounds can exhibit tautomerism?

A)  I and II                

B)  I and III               

C)  II and III              

D)  I, II and III  

Correct Answer: D

Solution :

In keto-enol tautomerism ketone form should have \[\alpha \]-hydrogen (structure I and II).

I.

II.

III.

Here, \[\gamma \]-H participates in tautomerism.