Assertion :- Lactose is the substrate for the enzyme `beta`-galactosidse & it regulates switching on & off of the operon.
Reson: A very low level of expression of lac operon is always present in cell all the time.
A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is Flase.
D. If both Assertion & Reason are false.
