Option (2) is the correct answer because • Diaphragms are barrier methods of contraception. They cover the cervix and block the entry of sperms. • Contraceptive pills are preparations containing either progestogens alone or combination of progestogen and oestrogen. They inhibit ovulation and implantation as well as alter the quality of cervical mucus to prevent entry of sperms. • Intra uterine devices increase the phagocytosis of sperms within the uterus. • Lactational amenorrhoea is a natural method of contraception and it is based on the fact that the ovulation and therefore menstrual cycle do not occur during the period of intense lactation following parturition.