Assertion : Cyclohexanone exhibits keto-enol tautomerism. Reason : In cyclohexanone, one form contains the keto group \((>\mathrm{C}=\mathrm{O})\) while other contains enolic group \((-\mathrm{C}=\mathrm{C}-\mathrm{OH})\).

• Correct answer
  A

  If both assertion and reason are true and reason is the correct explanation of assertion.
• B

  If both assertion and reason are true but reason is not the correct explanation of assertion.
• C

  If assertion is true but reason is false.
• D

  If both assertion and reason are false.

Solution

Cyclohexanone exists in two readily interconvertible different structures leading to dynamic equilibrium known as tautomerism.

Hence, the correct answer is option: 'A'.