Assertion : Phenol is more reactive than benzene towards electrophilic substitution reaction. Reason : In the case of phenol, the intermediate carbocation is more resonance stabilised.

• 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.
• Correct answer
  C

  If assertion is true but reason is false.
• D

  If both assertion and reason are false.

Solution

$-\mathrm{OH}$ group shows $+M$ effect and is an activating group, moreover the arenium ion of phenolic substitution is more stable.

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