Which of the following does not exhibit tautomerism ?A. B. C. D.

1.	Which of the following does not exhibit tautomerism ?A. B. C. D.
Answer» Correct Answer - A For tautomerism to occur, at least one `alpha`-hydrogen should be presented on a saturated carbon next to the keto group. Since in option (a), `alpha`-hydrogens are not present on a saturated carbon and hence it does not show tautomerism. While all, other options contain `alpha`-hydrogens on saturated carbons next to the keto group and hence show tautomerism.

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Which of the following does not exhibit tautomerism ?A. B. C. D.

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