GAMETE will be HAPLOID (N). 2 polar NUCLEI will be DIPLOID (2n). Endosperm formed fusion of male gamete with two polar nuclei will be pentaploid. Male gamete + 2 polar nuclei \[n\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(2n)+(2n)\] \[\to \] Endosperm (5n)