Pick the odd one out : (Intensive or extensive).
Refractive index, density, temperature and enthalpy.

Explanation

To solve the question of identifying the odd one out among refractive index, density, temperature, and enthalpy based on whether they are intensive or extensive properties, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Intensive and Extensive Properties**:
- Intensive properties are those that do not depend on the amount of substance present. Examples include temperature, density, and refractive index.
- Extensive properties depend on the amount of substance present. Examples include mass, volume, and enthalpy.

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