Assertion (A): The elevation in boiling point for two isotonic solutions may not be same.
Reason (R ): The boiling point depends upon the concentration of the solute.

Options

A. If both `(A)` and `(R )` are correct, and `(R )` is the correct explanation of `(A)`.
B. If both `(A)` and `(R )` are correct, but `(R )` is not the correct explanation of `(A)`.
C. If `(A)` is correct, but `(R )` is incorrect.
D. If both `(A)` and `(R )` are incorrect.

Explanation

To solve the question regarding the assertion and reason about the elevation in boiling point for isotonic solutions, we will analyze both statements step by step.

### Step 1: Understanding the Assertion
**Assertion (A):** The elevation in boiling point for two isotonic solutions may not be the same.

- **Isotonic Solutions:** Isotonic solutions are those that have the same osmotic pressure. This implies that they have the same concentration of solute particles.
- **Elevation in Boiling Point:** The elevation in boiling point is a colligative property, which means it depends on the number of solute particles in a solution, not their identity.

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