o-hydroxybenzoic acid is less/more acidic than p-hydroxy benzoic acid.

Explanation

To determine whether o-hydroxybenzoic acid is less or more acidic than p-hydroxybenzoic acid, we need to analyze the stability of their conjugate bases after they donate a proton (H⁺).

### Step-by-Step Solution:

1. **Understanding Acidity**:
- Acidity is defined by the ability of a compound to donate a proton (H⁺). The strength of an acid is influenced by the stability of its conjugate base after the proton is lost.

2. **Identify the Compounds**:
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