question_answer

Given,                                  [NEET 2015 ]    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: A

Solution :

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

I.

II.

III.

Here, -H participates in tautomerism.