The correct option is D Oestrogen and progesterone
Most birth control pills are combination pills containing a combination of the hormones oestrogen and progesterone to prevent ovulation. A woman cannot get pregnant if she doesn't ovulate because there is no egg to be fertilized. The pill also works by thickening the mucus around the cervix, which makes it difficult for sperm to enter the uterus and reach any eggs that may have been released. The hormones in the pill can also sometimes affect the lining of the uterus, making it difficult for an egg to attach to the wall of the uterus.