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Q.
Which of the following is an antifertility drug?
Chemistry in Everyday Life
Solution:
Antifertility drugs are chemical substances which suppress the action of hormones that promote pregnancy.
An antifertility drug is novestrol (Ethynylestradiol). Another example of antifertility drugs is norethindrone.
Veranal and Equanil are tranquillizers. Histamine is not a drug. Histamine stimulates the secretion of $HCl$ and pepsin in the stomach.