Assertion : The basic of Laplace correction was that, exchange of heat between the region of compression and rarefaction in air is not possible.
Reason : Air is a bad conductor of heat and velocity of soundin air is large.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Explanation

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

### Step 1: Understand the Assertion
The assertion states that the basis of Laplace correction is that the exchange of heat between the region of compression and rarefaction in air is not possible.

**Explanation**:
- The Laplace correction is related to how sound waves propagate through a medium. In sound waves, there are regions of compression and rarefaction. For the propagation of sound, it is essential that these regions do not exchange heat; otherwise, the temperature would change, affecting the speed of sound.

### Step 2: Understand the Reason
The reason given is that air is a bad conductor of heat and the velocity of sound in air is large.

**Explanation**:
- Air being a bad conductor of heat means that it does not allow heat to flow easily between the regions of compression and rarefaction. This characteristic helps maintain the temperature of these regions during the propagation of sound waves, supporting the assertion that heat exchange is negligible.
- The velocity of sound being large implies that sound waves can travel quickly through air, but this does not directly affect the heat exchange process.

### Step 3: Evaluate the Relationship Between Assertion and Reason
Both the assertion and reason are correct statements. However, we need to determine if the reason is a correct explanation of the assertion.

**Analysis**:
- Since air's poor thermal conductivity prevents heat exchange between the regions of compression and rarefaction, it supports the assertion. Therefore, the reason provides a valid explanation for the assertion.

### Conclusion
Both the assertion and reason are correct, and the reason is indeed a correct explanation of the assertion.

### Final Answer
- **Assertion**: True
- **Reason**: True
- **Explanation**: The reason correctly explains why the assertion holds true.

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