Which of following assisted reproductive technique is used to inject sperms into vagina or uterus of female?

Assisted Reproductive Technologies (ART) is a group of special techniques which helps infertile couple by retrieving oocytes from the ovary or the sperms from the epididymis, then perform artificial insemination and development of the embryo. The 4 main types of techniques used under ART are GIFT or Gamete intrafallopian transfer, ZIFT or Zygote intra-fallopian transfer, IVF-ET or In vitro fertilization and embryo transfer & AIT or Artificial insemination technique. In the artificial insemination, the semen is extracted, washed, centrifuged and the motile sperms are taken & injected artificially into the uterus or the vagina. AIT too is of two types, AIH is done by husband's semen  & AID this is performed by donor's semen.  So the correct answer is 'A'  'Artificial insemination'.