Assertion: When a force `vecF` attempts to slide a body along a surface, a frictional force parallel to the surface and directed so as to oppose the sliding, is exerted on the body by the surface.
Reason: It is due to the bonding between the body and the surface.

Options

A. If both assertion `&` Reason are True `&` the Reason is a corrrect explanation of the Asserion.
B. If both Assertion `&` Reason are True but Reason is not correct explanation of the Assertion.
C. If Assertion is Trie but the Reason is False.
D. If both Assertion `&` Reason are false

Explanation

To analyze the given assertion and reason, we will break down the concepts involved in friction and the interaction between a body and a surface.

### Step-by-step Solution:

1. **Understanding the Assertion**:
- The assertion states that when a force \( \vec{F} \) attempts to slide a body along a surface, a frictional force is exerted on the body by the surface. This frictional force acts parallel to the surface and opposes the direction of the applied force.
- This is true because friction always acts to resist the relative motion between two surfaces in contact.

2. **Analyzing the Direction of Friction**:
- When a force is applied to slide the body, the frictional force will act in the opposite direction to the applied force. For example, if the applied force is directed to the right, the frictional force will act to the left.
- This opposing nature of friction is a fundamental characteristic of frictional forces.

3. **Understanding the Reason**:
- The reason given is that the frictional force arises due to the bonding between the body and the surface.
- This bonding is a result of microscopic irregularities on the surfaces in contact. When two surfaces are pressed together, these irregularities interlock, creating a resistance to motion.

4. **Conclusion**:
- Both the assertion and the reason are correct. The assertion accurately describes the behavior of friction in response to an applied force, and the reason correctly explains why this frictional force exists due to the bonding and interlocking of surface irregularities.

### Final Statement:
- Therefore, both the assertion and the reason are true, and the reason correctly explains the assertion.