Assertion: Auxin and cytokinin are required in correct concentration for the development of root and shoot in callus.
Reason: When the concentration of kinetin to auxin is high the shoot develops,and when the concentration is low root develops.
(A) Both assertion and reason are true and the reason is a correct explanation of the assertion
(B) Both assertion and reason are true but reason is not a correct explanation of the assertion
(C) Assertion is true but the reason is false
(D) Both assertion and reason are false
