What is true about 'Saheli??

$I$. Developed at $CDRI$, Lucknow

$II$. Contains a steroidal preparation

$III$. 'Once-a-week' pill

$IV$. Many side effects

$V$. High contraceptive value

$VI$. Very few side effects

$VII$. Low contraceptive value

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

Mark the correct statement

What is the function of copper $T ?$

……. IUDs, in addition, make the uterus unsuitable for implantation and the cervix hostile to the sperms.