Assertion If a particle is rotating in a circle, then centrifugal force is acting on the particle in radially outward direction .
Reason centrifugal force is equal and opposite to the centripetel force.

Options

A. If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
B. If both Assertion and Reason are correct 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 both the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that if a particle is rotating in a circle, then a centrifugal force acts on the particle in a radially outward direction.
- This statement is true when viewed from a rotating (non-inertial) frame of reference. In such a frame, an observer would feel a force pushing them outward, which is referred to as the centrifugal force.

2. **Understanding the Reason**:
- The reason states that the centrifugal force is equal and opposite to the centripetal force.
- This is also true. The centripetal force is the net force acting on the particle directed towards the center of the circular path, necessary for circular motion. In a non-inertial frame, the centrifugal force appears to balance this centripetal force, making them equal in magnitude and opposite in direction.

3. **Conclusion**:
- Both the assertion and the reason are true.
- The reason correctly explains the assertion because the centrifugal force is indeed a fictitious force that arises in a non-inertial frame to account for the effects of the centripetal force acting on the particle.

### Final Answer:
Both the assertion and reason are true, and the reason correctly explains the assertion.