Assertion: Distance is a scalar quantity.
Reason: Distance is the length of path traversed.

Answer

To solve the question, we need to analyze both the assertion and the reason provided.

**Step 1: Understand the Assertion**
- The assertion states that "Distance is a scalar quantity."
- A scalar quantity is defined as a quantity that has only magnitude and no direction. Examples include mass, temperature, and distance.

**Step 2: Understand the Reason**
- The reason states that "Distance is the length of the path traversed."
- This means that distance measures how much ground an object has covered during its motion, regardless of the direction taken.

**Step 3: Analyze the Relationship**
- We need to determine if the reason correctly explains the assertion.
- While it is true that distance is the length of the path traversed, this does not explain why distance is classified as a scalar quantity. The classification as a scalar is based on the absence of direction, not merely the definition of distance.

**Step 4: Conclusion**
- Both the assertion and the reason are true:
- Assertion: True (Distance is indeed a scalar quantity)
- Reason: True (Distance is the length of the path traversed)
- However, the reason does not serve as a correct explanation for the assertion, as it does not address the aspect of directionality that defines scalar quantities.

Thus, the final answer is:
- Both assertion and reason are true, but the reason is not a correct explanation for the assertion.