Human Health and Diseases — BIOLOGY STD 12 Science — Question

$R$ : Promotor region lies at $5^{\prime}$ of template strand, $?$

$I$. 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