Assertion : A wheel moving down a perfectly frictionless inclined plane will undergo slipping (not rolling motion)
Reason : For perfect rolling motion, work done Reason against friction is zero.

Explanation

To solve the given assertion and reason question, we need to analyze both statements carefully.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
The assertion states that a wheel moving down a perfectly frictionless inclined plane will undergo slipping rather than rolling.
- In a frictionless scenario, there is no frictional force to provide the necessary torque for rolling.
- Therefore, the wheel will slide down the incline without rolling.

2. **Understanding the Reason**:
The reason provided states that for perfect rolling motion, the work done against friction is zero.
- In perfect rolling motion, the point of contact between the wheel and the surface does not slip, meaning that the wheel rolls without losing contact.
- However, in the case of a frictionless surface, there is no friction to do work against, which means the wheel cannot roll.

3. **Evaluating the Relationship**:
- The assertion is true because a wheel on a frictionless incline cannot roll; it will slip down the incline.
- The reason is also true, but it does not directly support the assertion. The reason explains a condition for rolling motion but does not explain why the wheel slips on a frictionless incline.

4. **Conclusion**:
- Since both the assertion and the reason are true, but the reason does not correctly explain the assertion, the correct answer is that the assertion is true, and the reason is true but does not support the assertion.

### Final Answer:
- Assertion: True
- Reason: True (but does not support the assertion)