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 the properties: refractive index, density, temperature, and enthalpy, we will categorize each property as either intensive or extensive.

### Step-by-Step Solution:

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

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