These questions consists of two statements each printed as Assertion and Reason. While answering these question you are required to choose any one of the following five reponses
(a) If both Assertion and Reason arecorrect and Reason is the correct explanation of Asserrtion.
(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.
Assertion Spring force is a conservative force.
Reason Potential energy is defined only for conservative forces.

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 "Spring force is a conservative force."
- A conservative force is defined as a force where the work done in moving an object between two points is independent of the path taken. Spring force, which follows Hooke's law, is indeed a conservative force because the work done in compressing or stretching a spring only depends on the initial and final positions, not on the path taken.

2. **Understanding the Reason**:
- The reason states that "Potential energy is defined only for conservative forces."
- This statement is true. Potential energy is associated with conservative forces, as it represents the stored energy due to the position of an object in a force field (like gravitational or spring force). Non-conservative forces, like friction, do not have a potential energy associated with them because the work done depends on the path taken.

3. **Evaluating the Relationship**:
- Both the assertion and the reason are correct.
- Furthermore, the reason provides a correct explanation for the assertion. Since potential energy is indeed defined for conservative forces, and since the spring force is a conservative force, the reason supports the assertion.

4. **Conclusion**:
- Since both the assertion and the reason are correct, and the reason correctly explains the assertion, the correct response is (a).

### Final Answer:
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

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