Which organization developed the spermicide 'Saheli' (or related contraceptive research)?

Find the odd one out $w.r.t.$ Saheli.

Spermicidal tablets are composed of which of the following substances?

Diaphragms,cervical caps,and vaults are:

Which of the following approaches does not give the defined action of contraceptive?

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.