ZIFT is an assisted reproductive technique in which:

The correct answer is Option (3) → The zygote or early embryos with upto 8 blastomeres are transferred into the fallopian tube

Option (1) The early embryos, more than 8 blastomeres are transferred into the fallopian tube — Incorrect. An embryo with more than 8 blastomeres goes into the uterus, not the fallopian tube. That method is IUT (intra uterine transfer).

Option (2) The zygote with upto 8 blastomeres are transferred into the uterus — Incorrect. The size is right but the place is wrong. In ZIFT the zygote goes into the fallopian tube, where fertilisation and early cleavage normally happen.

Option (3) The zygote or early embryos with upto 8 blastomeres are transferred into the fallopian tube — Correct. Both points match ZIFT: up to 8 blastomeres, and transfer into the fallopian tube.

Option (4) The ovum is transferred from the donor into the fallopian tube of another female — Incorrect. This describes GIFT (gamete intra fallopian transfer). In GIFT an ovum, not a zygote, is placed in the fallopian tube of a female who cannot produce ova but can provide the right place for fertilisation.

NCERT Extract:
Infertility – …