Which of the following are extensive properties ?

Options

A. Elevation in boiling point
B. Boiling point
C. emf of cell
D. `E^(Theta)` of cell

Explanation

To determine which of the following are extensive properties, we first need to understand the definition of extensive properties in thermodynamics.

### Step-by-Step Solution:

1. **Define Extensive Properties**:
- Extensive properties are those properties of matter that change when the amount of matter changes. They depend on the quantity of the substance present.

2. **Identify the Options**:
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