Assertion: Parallex method cannot be used for measuring distances of stars more than 100 light years away. Reason: Because parallex angle reduces so much that it cannot be measured accurately.

• 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.