Assertion: The flash of lightening is sees before the sound of thunder is heard.
Reason: Speed of sound is greater than speed of light.
A. if both the assertion and reason are true and reson is a true explanation of the assertion.
B. if both the assertion and reason are true but the reason is not the correct explanation of assertion.
C. If the assertion is true but reason is false.
D. If both the assertion and reason are false.
