Find out the right aspects of lactational amenorrhoea

$I$. Ovulation do not occur during the lactational period

$II$. Chances of the failure of contraception are almost nil upto six months following parturition

$III$. Side effects are almost nil

$IV$. It is a natural method of contraception

$V$. It increases phagocytosis of sperms

• A

  $II$, $III$, $IV$ and $V$

• B

  All except $V$

• C

  $II$, $III$, $IV$ and $V$

• D

  All of these