MCQ
Tautomerism is not exhihited by
  • A

  • B

  • C


Answer

Correct option: D.

d
Option $(D)$ can't exhibit tautomerism. By transferring of $\alpha- H$ to oxygen will result in formation cummulated double bond favoring bond angle of $180^{\circ}$ making ring very unstable. So, tautomerism will not occur here.

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