BotanyPEC (Primary Endosperm cell) is formed

PEC (Primary Endosperm cell) is formed

A
after triple fusion
B
before triple fusion
C
at the time of syngamy
D
always persisted

Solution:

After triple fusion, i.e. the fusion of male gametes and polar nuclei, the central cell of female gametophyte becomes the Primary Endosperm Cell (PEC).