A: Magnesium oxide is used for the lining in steel making furnace .
R: Magnesium oxides acts as flux

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
C. If Assertion is true statement but Reason is false, then mark
D. If both Assertion and Reason are false statements, then mark (4)

Answer

To analyze the statements given in the question, we will break down the assertion (A) and the reason (R) step by step.

### Step 1: Analyze the Assertion (A)
**Assertion (A)**: Magnesium oxide is used for the lining in steel making furnace.

- **Explanation**: Magnesium oxide (MgO) is indeed used in steel-making furnaces. This is because it is a refractory material, which means it can withstand very high temperatures without melting or breaking down.

### Step 2: Analyze the Reason (R)
**Reason (R)**: Magnesium oxide acts as flux.

- **Explanation**: Magnesium oxide does act as a flux in metallurgical processes. Fluxes are substances that help remove impurities from metals during the smelting process. In this case, magnesium oxide can help remove acidic impurities from the furnace, acting as a basic flux.

### Step 3: Determine the Truth Value of A and R
- Both the assertion (A) and the reason (R) are true. However, the reason provided does not correctly explain why magnesium oxide is used for the lining in steel-making furnaces. The primary reason for its use is its refractory nature and ability to withstand high temperatures, not solely because it acts as a flux.

### Step 4: Conclusion
- The assertion is true, and the reason is also true, but the reason does not serve as the correct 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
Both A and R are true, but R is not the correct explanation for A.

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