A .  Suppression of fertilization by forming a membrame
B .  Disturbing the site of implantation
C .  Acting as a barrier
D .  Destroying the zygote formed
Answer: Option B : B IUD is a very tiny T-shaped device made of copper coil inserted into the uterine cavity by a doctor or nurse and left there for certain period for the contraception purpose. IUD works by disrupting implantation. The IUD affects the uterine lining (where a fertilized egg implant and grow).
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