The correct option is A Fertilization
Tubectomy
is a surgical method of contraception in females. It is a sterilisation
procedure in which a small part of fallopian tube is removed or cut and tied up
through a small incision in the abdomen or through vegina. Fallopian tube is a
site for the fertilization of eggs. So tubectomy prevents fertilization. These
techniques are highly effective but their reversibility is very poor.