Identify 'X' and 'Y' with reference to double fertilization in Angiosperms. Male gamete + Egg cell 'X' Male gamete + Secondary nucleus 'Y' -> (A) X-haploid zygote, Y- diploid PEN (B) X-diploid zygote, Y- triploid PEN (C) X-haploid zygote, Y- diploid endosperm (D) X-diploid zygote, Y- diploid embryo