Double fertilization is unique to angiosperms in which one male gamete fuse with ___A____ to from ___B___ and the other male gamete fuse with __C__ to from ____D____.Choose the correct option for A,B,C and D :

During double fertilization, one of the male gametes fuses with the egg cell (syngamy) to form a zygote. The other male gamete fuses with the diploid secondary nucleus to produce the triploid primary endosperm nucleus (PEN).