AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
(C) Oral contraceptive pills
Oral contraceptive pills work by changing the hormonal balance of the body so that eggs are not released, thus preventing fertilisation.
The passage clearly states that one category of contraceptives "acts by changing the hormonal balance of the body so that eggs are not released." These drugs are "commonly taken orally as pills." Copper-T works by irritating the uterus; condom is a mechanical barrier; surgical blocking of fallopian tube prevents the egg from reaching the uterus — none of these involve hormonal changes to stop egg release.