The correct option is B Coitus interruptus
Coitus interruptus is also called the withdrawal method. It is a natural birth control method in which, during the intercourse, the male partner withdraws his penis from the vagina (female reproductive tract) just before ejaculation so as to avoid releasing the sperms into the female reproductive system.
Lactational amenorrhea is the absence of menstruation, ovulation and menstrual cycle during the period of intense lactation right after parturition.
Periodic abstinence is when the couples avoid coitus during the female’s fertile days i.e from day 10 to 17 of the menstrual cycle.
In barrier methods, ovum and sperm are prevented from physically meeting even after ejaculation with the help of barriers. Such methods are available for both males and females. For example, condoms.