Assertion:- Vacuoles are osmoregulatory components of cell.
Reason:- lons and other materials are stored in vacuole.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are false.

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that "Vacuoles are osmoregulatory components of the cell." This means that vacuoles play a role in regulating the osmotic balance within the cell.

**Hint**: Recall what osmoregulation means and how it relates to cellular functions.

2. **Understanding the Reason**: The reason given is that "Ions and other materials are stored in vacuoles." This indicates that vacuoles have a storage function, which is essential for maintaining the osmotic balance.

**Hint**: Think about the composition of vacuoles and their role in storing substances.

3. **Connecting Assertion and Reason**: The assertion is supported by the reason. If vacuoles store ions and other materials, they can help regulate the osmotic pressure by controlling the concentration of these substances in the cell.

**Hint**: Consider how the storage of ions can influence water movement in and out of the cell.

4. **Evaluating the Truth of Both Statements**: Both the assertion and the reason are true. Vacuoles do function as osmoregulatory components, and they do store ions and other materials.

**Hint**: Check if both statements are factually correct based on your knowledge of cell biology.

5. **Conclusion**: Since both the assertion and the reason are true, and the reason correctly explains the assertion, we conclude that the answer is that both statements are true and the reason is a correct explanation for the assertion.

**Hint**: Reflect on the relationship between the two statements to finalize your answer.

### Final Answer:
Both the assertion and the reason are true, and the reason is a correct explanation of the assertion.