Which of the following contraceptive devices make uterus unsuitable...

All the options are examples of intrauterine contraceptive devices (IUCDs). These are plastic or metal objects which are inserted by doctors in the uterus through vagina. Lippe's loop is non-medicated IUCD. CuT and Multiload are copper releasing IUCDs, which suppress motility and fertilizing capacity of sperms. Progestasert is a hormone releasing IUCD which makes the uterus unsuitable for implantation and cervix hostile to the sperms.