When should a female take oral contraceptive pills?

Which of the following statements is true regarding $IUDs$ used by females?

Which of the following is not included under barrier methods of birth control?

Which of the following hormone/s is/are maintained at high level during hormonal method of birth control?

$IUDs$ are small objects made up of plastic or copper that are inserted in the uterine cavity. Which of the following statements are correct about $IUDs$?
$(a)$ $IUDs$ decrease phagocytosis of sperm within the uterus.
$(b)$ The released copper ions suppress the sperm motility.
$(c)$ $IUDs$ do not make the cervix hostile to the sperm.
$(d)$ $IUDs$ suppress the fertilization capacity of sperm.
$(e)$ The $IUDs$ require surgical intervention for their insertion in the uterine cavity.
Choose the most appropriate answer from the options given below:

$A$ contraceptive pill contains: