Assertion : Every vibrating body is a source of sound.
Reason : All sounds are audible to us.

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 assertion is false but reason is true.

Explanation

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

### Step 1: Analyze the Assertion
**Assertion:** Every vibrating body is a source of sound.
- Explanation: This statement is true. When any body vibrates, it creates disturbances in the surrounding medium (like air), which leads to the production of sound waves. Therefore, every vibrating body indeed acts as a source of sound.

### Step 2: Analyze the Reason
**Reason:** All sounds are audible to us.
- Explanation: This statement is false. While many sounds are within the audible range for humans (20 Hz to 20,000 Hz), there are sounds outside this range, such as infrasonic (below 20 Hz) and ultrasonic (above 20,000 Hz) sounds, which we cannot hear. Therefore, not all sounds are audible to us.

### Step 3: Conclusion
- Since the assertion is true and the reason is false, we can conclude that the correct option is that the assertion is true, but the reason is false.

### Final Answer
The assertion is true, and the reason is false.

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