A : Energy dissipated against friction depends on the path followed.
R : Friction force is non-conservative force.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).
C. If Assertion is true statement but Reason is false, then mark (3).
D. If both Assertion and Reason are falsė statements, then mark (4).

Answer

To solve the question, we need to analyze the assertion (A) and the reason (R) provided.

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that "Energy dissipated against friction depends on the path followed."
- This means that the work done against friction is not constant and varies depending on the route taken.

2. **Understanding the Reason (R)**:
- The reason states that "Friction force is a non-conservative force."
- Non-conservative forces are those that do not conserve mechanical energy. The work done against these forces depends on the path taken rather than just the initial and final states.

3. **Linking Assertion and Reason**:
- Since friction is a non-conservative force, the work done against friction indeed varies with the path taken. This supports the assertion.
- For example, if you slide an object across different surfaces or take different routes, the energy lost due to friction will change.

4. **Conclusion**:
- Both the assertion (A) and the reason (R) are correct.
- Moreover, the reason correctly explains the assertion because the path dependency of the energy dissipated against friction is due to the non-conservative nature of the frictional force.

5. **Final Answer**:
- Therefore, the correct answer is that both A and R are true, and R is the correct explanation of A.