The function of copper ions in copper-releasing $IUDs$ is:

What is the purpose of contraceptive pills?
$I$. They inhibit ovulation and implantation
$II$. They alter the quality of cervical mucous to prevent or retard the entry of sperms
$III$. They prevent the ejaculated semen from entering the female vagina
$IV$. They inhibit spermatogenesis

Match the following columns:

Column-$I$	Column-$II$
$(A)$ Barrier	$(1)$ Copper-$T$
$(B)$ $IUD$	$(2)$ Vasectomy and tubectomy
$(C)$ Surgical technique	$(3)$ Condoms,cervical caps
$(D)$ Administering hormones	$(4)$ Oral pills and Saheli

Match the following columns:

Column-$I$	Column-$II$
$A$. Pill	$1$. Intra uterine device
$B$. Condom	$2$. Prevents ovulation
$C$. Vasectomy	$3$. Prevents sperms from reaching to cervix
$D$. Cu-$T$	$4$. Semen contains no sperms

Progestasert and $LNG-20$ are

Choose the correct option for $A, B, C$ and $D$.