The correct option is C Hormone releasing IUDs
Intrauterine devices (IUDs) are the devices used for contraception. There devices are inserted by the doctors into the uterus through vagina. There are three types of IUDs:
i) Non-medicated IUDs: They increases the phagocytosis of the sperm within the uterus, 𝑒.𝑔., Lippes loop.
ii) Copper releasing IUDs: Along with phagocytosis of the sperms, the copper ions released, suppress the sperm motility and its fertilizing capacity, 𝑒.𝑔., Cu-T, Cu-7, multiload-375.
iii) Hormone releasing IUDs: They makes the uterus unsuitable for implantation and the cervix hostile to the sperms, 𝑒.𝑔, progestasert, LNG-20.