Assertion : Plants usually bend towards the source of light
Reason :Shoot apex shows positive phototropism because of differential growth caused due to unequal distribution of auxin.
A. If both Assetion and Reason are true and the Reason is a correct explanation of the Assertion
B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion
C. If Assertion is true but the Reason is false
D. If both Assertion and Reaon are false
