Which one of the following events takes place after double fertilisation ?

Options

A. The pollen grain germinates on the stigma
B. The pollen tubes enter the embryo sac
C. Two male gametes are dischared into the embryo sac.
D. The PEN (Primary Endosperm Nucleus) develops into endosperm.

Answer

D

Explanation

Options (a),(b) and (c) respresent the events that take place before fertilisation. Primary endosperm nucleus (PEN) is formed after double fertilisation and develops into endosperm.