Fusion of the male gamete and polar nucleus results in the formation of

Answer: Option A

Fusion of the male gamete and polar nucleus results in the formation of the Endosperm.
The endosperm is a tissue produced inside the seeds of most flowering plants following double fertilization.
It is triploid (meaning three chromosome sets per nucleus) in most species, which may be auxin-driven.
It surrounds the embryo and provides nutrition in the form of starch, though it can also contain oils and protein. This can make endosperm a source of nutrition in animal diets.