The correct option is D Embryo upto 8 blastomeres, if zygote is not transplanted
After the fusion of male and female gametes in the lab, the zygote or early embryos (with upto 8 blastomeres) could then be transferred into the fallopian tube (ZIFT–zygote intra fallopian transfer) and embryos with more than 8 blastomeres, into the uterus (IUT–intra uterine transfer), to complete its further development.