A : Na and Li are stored under kerosene.
R : Na and Li are soluble in kerosene.

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 solve the question, we need to analyze both the assertion (A) and the reason (R) given:

**Assertion (A):** Na and Li are stored under kerosene.
**Reason (R):** Na and Li are soluble in kerosene.

### Step-by-Step Solution:

1. **Understanding the Assertion (A):**
- Sodium (Na) is a highly reactive metal that reacts vigorously with moisture and oxygen in the air. To prevent this reaction, sodium is stored under kerosene.
- Lithium (Li), while also reactive, is less so than sodium. However, lithium is the lightest metal and tends to float on the surface of kerosene. It can still react with moisture and air.

2. **Evaluating the Storage of Lithium:**
- Although lithium is reactive, it does not dissolve in kerosene. Instead, it floats on the surface and can react with the air above the kerosene layer. Therefore, it is not typically stored under kerosene like sodium.

3. **Understanding the Reason (R):**
- The reason states that both sodium and lithium are soluble in kerosene. This is incorrect because lithium does not dissolve in kerosene; it floats on the surface and reacts with air.

4. **Conclusion:**
- Since the assertion that both Na and Li are stored under kerosene is incorrect (as Li cannot be stored this way), and the reason that both are soluble in kerosene is also incorrect, we conclude that both the assertion and the reason are false.

### Final Answer:
Both assertion and reason are false. Therefore, the correct option is D.

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