Which of the following contraceptive methods is considered to have the least side effects?

What phenomenon is depicted in the given figure?

Which of the following is not a natural/traditional contraceptive method?

Injections and implants (containing progesterone or progesterone-oestrogen combinations) are used by females under the:

Match the contraceptive methods given under column-$I$ with their examples given under column-$II$. Select the correct choice from those given below.

Column $I$	Column $II$
$A$. Chemical	$p$. Tubectomy and vasectomy
$B$. $IUDs$	$q$. Copper $T$ and loop
$C$. Barriers	$r$. Condom and cervical cap
$D$. Sterilisation	$s$. Spermicidal jelly and foam
	$t$. Coitus interruptus and calendar method

Amongst the following methods of contraception,which can be regarded as the most cost-effective and easily reversible method of contraception?