Tablets to prevent contraception contain

Which of the following contraceptive methods involves a role of hormones?

Amongst the following methods of contraception,which can be regarded as the most cost-effective and easily reversible method of contraception?

In delaying pregnancy or spacing among children,the ideal contraceptive is

Which process do the contraceptive pills $Today$ and $Nim-72$ use to prevent fertilization?

Which of the following methods does not function as a contraceptive?