How do Intrauterine Devices $(IUDs)$ function as a method of birth control?

Which of the following is a copper-releasing $\text{IUD}$?

Select the odd one out.

The function of copper ions in copper-releasing $IUDs$ is:

$ . . . . . . $ is a natural contraceptive method.

Identify the false statement regarding the techniques of contraception.
$I$. There are many side effects of tubectomy and vasectomy.
$II$. The purpose of tubectomy is to prevent egg formation.
$III$. The most important component of the oral contraceptive pill is progesterone.
$IV$. Contraceptive oral pills help in birth control by preventing ovulation.