The correct option is D Intrauterine device
Mala A, Mala D, Saheli are the example of contraceptive pills which prevent ovulation.
Vasectomy and tubectomy are the methods of sterilization.
GIFT, ZIFT, IUI, ICSI are the techniques of ART for the couples who don't have children.
CuT, LNG-20, Cu7 are intrauterine devices which prevent implantation.
Monoclonal antibodies are important in diagnosis of disease.