Raman is learning the post fertilization changes of an angiosperm embryo sac with the help of slides. He identified the egg nucleus and polar nuclei in the central cell with the help of his teacher. Help raman by giving the changes that take place with egg nucleus and polar nuclei.

Explanation

one male gamete fused with an egg nucleus and from diploid zygote is called syngamy.
2nd male gamete fused with two polar nuclei in the central cell and form triploid primary endosperm nucleus. (PEN) is called triple fusion.