What is not true for ZIFT?

The correct answer is Option (4) → ZIFT is a form of GIFT

ZIFT (zygote intra fallopian transfer) is a method of assisted reproduction in which the egg is fertilised in the laboratory and the zygote or early embryo (up to 8 blastomeres) is put into the fallopian tube.

Option (1) Invitro fertilization take place in ZIFT — True for ZIFT. The gametes are fused outside the body, in the laboratory.

Option (2) Zygote is formed under sterilized laboratory conditions — True for ZIFT. The zygote forms under simulated conditions in the laboratory.

Option (3) Zygote is transferred into the fallopian tube — True for ZIFT. In ZIFT the zygote or early embryo (up to 8 blastomeres) is placed in the fallopian tube; the name zygote intra fallopian transfer says so. Embryos with more than 8 blastomeres go into the uterus instead (IUT).

Option (4) ZIFT is a form of GIFT — Not true for ZIFT. In GIFT (gamete intra fallopian transfer) an ovum, not a zygote, is put into the fallopian tube and fertilisation happens inside the body. The two are different methods.

NCERT Extract:
Infertility – “… 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.”
Infertility – “… Transfer of an ovum collected from a donor into the fallopian tube (GIFT – gamete intra fallopian transfer) of another female who cannot produce one, but can provide suitable environment for fertilisation and further development is another method attempted.”