Choose the number of diploid structures in the list given below:
Pollen grains, nucellus, perisperm, endosperm, embryosac, megaspore
Three
Two
Four
One
Pollen grains: Haploid (n)
Nucellus: Diploid (2n)
Perisperm: Diploid (2n)
Endosperm: Triploid (3n)
Embryosac: Haploid (n)
Megaspore: Haploid (n)