A women uses pills A a as a method of birth control (or preventing pregnancy). The pills A stop the ovaries from releasing ovum into oviducts. Another women uses pills B as a method of birth control. The pills B kill the sperms and prevent pregnancy.
(a) What do the pills A contain ?
(b) What is the common name of pills A ?
(c ) What do the pills B contain ?
(d) What is the common name of lills B ?
(e) What is the general name of these methods of birth control?
