Answer: Option B
:
B
Physical barriers preventing pregnancy form barriers between the sperm and the egg. Examples of these include the male condom, female condom, diaphragm, cervical cap, and sponge. IUDs are intrauterine devices. An IUD is a tiny device that is inserted in the uterus to prevent pregnancy. It is a long-term, reversible, and one of the most effective birth control methods. However it is not a physical barrier between egg and the sperm.IUDs primarily work by preventing fertilisation. The progestrone released from the hormonal IUDs may prevent ovulation from occurring but only partially. Primarily the hormone thickens the cervical mucus so that sperm cannot reach the fallopian tubes, thus acting as a mechanical contraceptive, but not a physical barrier.