State with balanced equation what happens when 'Acetic anhydride reacts with phenol in the presence of a base'.

Explanation

To solve the question of what happens when acetic anhydride reacts with phenol in the presence of a base, we can follow these steps:

### Step 1: Identify the Reactants
The reactants in this reaction are:
- Acetic anhydride (CH₃C(=O)OCH₃)
- Phenol (C₆H₅OH)
- A base (commonly sodium hydroxide, NaOH, or hydroxide ion, OH⁻)

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