Assertion: The motion of a ceiling fan is rotational only.
Reason: The motion of a rigid body which is pivoted fixed of rotation.

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

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "The motion of a ceiling fan is rotational only."
- A ceiling fan rotates around a fixed axis (the point where it is mounted to the ceiling). This rotation is indeed a rotational motion.

2. **Understanding the Reason**:
- The reason states that "The motion of a rigid body which is pivoted is fixed for rotation."
- A rigid body that is pivoted at a point can rotate around that pivot. The ceiling fan, being pivoted at the ceiling, rotates around that fixed point.

3. **Evaluating the Assertion**:
- Since the ceiling fan rotates around its axis and does not translate (move linearly) in space, we can conclude that the assertion is true.

4. **Evaluating the Reason**:
- The reason correctly explains why the ceiling fan exhibits only rotational motion. Because it is pivoted at a fixed point, it can only rotate around that point. Therefore, the reason is also true.

5. **Conclusion**:
- Both the assertion and the reason are true, and the reason provides a correct explanation for the assertion. Therefore, the correct answer is that both the assertion and reason are true, and the reason is the correct explanation of the assertion.

### Final Answer:
- **Option A**: Both assertion and reason are true, and the reason is the correct explanation of the assertion.