Assertion : The periodic time of a hard spring is less as compared to that of a soft spring. Reason : The periodic time depends upon the spring constant, and spring constant is large for hard spring.

• A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
• B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
• C. If assertion is true but reason is false.
• D. If the assertion and reason both are false.
• E. If assertion is false but reason is true.