Given below are two statements one is labelled as Assertion (A) and the other as Reason (R).
Assertion (A) : Phytoplankton grow in abundance in the limnetic zone.
Reason (R) : Limnetic zone is open water zone.
Select the correct answer from the code given below :

1. A.(A) is false but (R) is true
2. B.(A) is true but (R) is false
3. C.Both (A) and (R) are true but (R) is not the correct explanation of (A)
4. D.Both (A) and (R) are true and (R) is the correct explanation of (A)