Assertion: The motion of the earth around the sun is perriodic but not oscillatory.
Reason: Oscillatory motion is necessarily periodic but periodic motion is not necessarily oscillatory.
A. If both assertion and reson are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.