Identify given figure.

$A$ : Periodic abstinence is one such natural method of contraception in which the couples avoid or abstain from
coitus from day $10 \;to\; 17$ of the menstrual cycle, when ovulation could be expected.
$R$ : $Day \;10 \;to \;day \;17$ of menstrual cycle is considered as safe period

Which of the following is not included under barrier methods of birth control?

A method of birth control is:

Find out correct choice for Cu based $IUDs$

$I$. Increases phagocytes of sperms

$II$. Releases $C u^{2+i i}$ ions that suppresses the sperms motility and fertilizing capacity of sperms

$III$. Make the uterus unsuitable for implantations