Given below are two statements:one is labelled as Assertion A and the other is labelled as Reason R:
Assertion A:In gymnosperms the pollen grains are released from the microsporangium and carried by air currents.
Reason R:Air currents carry the pollen grains to the mouth of the archegonia where the male gametes are discharged and pollen tube is not formed .
In the light of the above statements,choose the correct answer from the options given below:

Options

A. Both A and R are true but R is not the correct explanation of A
B. A is true but R is false
C. A is false but R is true
D. Both A and R are true and R is the correct explanation of A.