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.

**Assertion:** Spring force is a conservative force.
**Reason:** Potential energy is defined only for conservative forces.

### Step-by-Step Solution:

1. **Understanding Conservative Forces:**
- 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. This means that the work done depends only on the initial and final positions of the object.

2. **Analyzing the Assertion:**
- The assertion states that the spring force is a conservative force. This is true because the work done by a spring force (like Hooke's law) is independent of the path taken. The work done by the spring only depends on the initial and final positions of the spring's compression or extension.

3. **Analyzing the Reason:**
- The reason states that potential energy is defined only for conservative forces. This is also true. Potential energy is a concept that arises from conservative forces, as it represents the stored energy due to the position of an object in a force field (like gravitational or spring force).

4. **Determining the Relationship:**
- Since both the assertion and the reason are true, we need to determine if the reason correctly explains the assertion. The reason does explain the assertion because it establishes why the spring force can be classified as a conservative force: it allows for the definition of potential energy.

5. **Conclusion:**
- Therefore, the correct response is (a): If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

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