Assertion: Halides of Be dissolve in organic solvents
Reason: Atomic size of Be is smaller in the s-block elements.

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

Explanation

To solve the question, we need to analyze both the assertion and the reason provided.

### Step 1: Understand the Assertion
The assertion states that "Halides of Be dissolve in organic solvents."

- **Explanation**: Beryllium halides, such as BeCl2, are known to dissolve in organic solvents. This is primarily due to their covalent nature, which allows them to interact favorably with non-polar organic solvents.

### Step 2: Understand the Reason
The reason states that "Atomic size of Be is smaller in the s-block elements."

- **Explanation**: Beryllium (Be) is indeed the smallest element in the s-block due to its atomic number (4). However, while this fact is true, it does not directly explain why beryllium halides are soluble in organic solvents.

### Step 3: Analyze the Relationship Between Assertion and Reason
- The assertion is correct: Beryllium halides do dissolve in organic solvents.
- The reason is also correct: Beryllium has a smaller atomic size compared to other s-block elements.
- However, the reason does not adequately explain the assertion. The solubility of beryllium halides in organic solvents is more accurately attributed to their covalent character rather than the atomic size of beryllium.

### Conclusion
Both the assertion and reason are correct, but the reason does not provide a valid explanation for the assertion. Therefore, the correct answer is that both statements are true, but the reason is not the correct explanation for the assertion.

### Final Answer
- Assertion: True
- Reason: True
- Explanation: The assertion is correct because beryllium halides are covalent and soluble in organic solvents. The reason is true but does not explain the assertion.