Out of the following options,identify which one is $NOT$ a natural method of contraception.

Which is a contraceptive method with no side effects?

Which of the following statements is correct regarding oral contraceptive pills?

Match the following columns regarding the types of Intrauterine Devices $(IUDs)$:

Column $1$	Column $2$	Column $3$
$(a)$ First generation	$(p)$ High contraceptive efficacy	$(w)$ Non-medicated
$(b)$ Second generation	$(q)$ Effect on uterine lining	$(x)$ Metal ion releasing
$(c)$ Third generation	$(r)$ Low contraceptive efficacy	$(y)$ Hormone releasing

Regarding the given diagram,choose the incorrect statement $:-$

$IUDs$ within .......... of coitus have been found to be very effective as emergency contraceptives as they could be used to avoid possible pregnancy due to rape or casual unprotected intercourse. (in $hours$)