Assertion: Light year and year, both measure time. Reason: Because light year is the time that light takes to reach the earth from the sun.

• 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.