Which of the following is a method for birth control?

Which of the following conditions can help in avoiding fertilization?

An oral contraceptive pill checks:

$ . . . . . . $ is a natural contraceptive method.

Find out the correct aspects of lactational amenorrhoea.
$I$. Ovulation does not occur during the lactational period.
$II$. Chances of the failure of contraception are almost nil up to six months following parturition.
$III$. Side effects are almost nil.
$IV$. It is a natural method of contraception.
$V$. It increases phagocytosis of sperms.

In female sterilization,$A$ is cut and tied. This process is called $B$. Fill in the correct option for $A$ and $B$.