Assertion : In both radio activity and photoelectric effect electrons may be ejected.
Reason : In photoelectric effect and radio activity emission occurs only of unstable elements.
(1) If both assertion and reason are true and reason is the correct explanation of assertion.
(2) If both assertion and reason are true but reason is not the correct explanation of assertion.
(3) If assertion is true but reason is false.
(4) If both assertion and reason are false.
