A : Baryllium hydroxide is basic in nature only
R : It reacts with acid only and not with base.

Options

A. If both Assertion & Reason are true and the reason is the correct explanantion of the assertion, then mark (1).
B. If both Assertion & Reason are true and the reason is the correct explanantion of the assertion, then mark (2).
C. If Assertion is true statement but Reason is false. Them mark (3).
D. If both Assertion and reason are false statement, then mark (4).

Answer

To analyze the assertion and reason provided in the question, we will break down the concepts step by step.

### Step 1: Understanding the Assertion
The assertion states that "Beryllium hydroxide is basic in nature only."

- **Analysis**: Beryllium hydroxide (Be(OH)₂) is known to be amphoteric, which means it can act as both an acid and a base. Therefore, the assertion that it is "basic in nature only" is incorrect.

### Step 2: Understanding the Reason
The reason states that "It reacts with acid only and not with base."

- **Analysis**: This statement is also incorrect. Beryllium hydroxide can react with both acids and bases. When it reacts with acids, it shows its basic nature, and when it reacts with strong bases, it shows its acidic nature. Thus, the reason provided does not accurately describe the behavior of beryllium hydroxide.

### Step 3: Conclusion
Since both the assertion and the reason are false, we can conclude that:

- **Assertion (A)**: False
- **Reason (R)**: False

### Final Answer
Both the assertion and the reason are false, which corresponds to option 4.

---