Assertion(A): Only two structural gene products in lac operon are required for metabolism of lactose.
Reason(R): The y gene codes for permease, which increases permeability of the cell to b-galactosides.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.