Question

An antifertility drug is:
(a) novestrol
(b) histamine
(c) vernal
(d) equanil

Answer 1

Hint: Drugs are chemical substances that can cause changes in the functioning of a living being. Certain drugs can be used to prevent pregnancy and also be used for menopausal treatments. These are called antifertility drugs. Here among the given options the anti fertility drug is also known as Ethinylestradiol.

Complete step by step solution:
Chemical substances or drugs which can suppress the action of hormones that promote pregnancy are called antifertility drugs. Intake of this drug will avoid a person from becoming pregnant. It is a birth control drug. Let us consider each option given in the question;
-Novestrol is also known as Ethinylestradiol. It is an estrogen medication which is widely used in birth control pills. It can be also used as treatment of menopausal symptoms. Thus, this drug prevents pregnancy. Novestrol is an antifertility drug.

-Histamine is an organic nitrogenous compound found in some body cells. It is not a drug. It can act as a neurotransmitter for the brain, spinal cord and uterus.
-Veranal is a tranquilizer. Tranquilizers are drugs which are used to treat anxiety, fear, tension, disturbances of mind and agitation, specifically to reduce the state of tension.
-Equanil also was a minor tranquilizer for a time. It is a derivative of carbamate and is used to reduce anxiety in a person. It is also known as meprobamate. It has many side effects like headache, drowsiness sometimes lead to coma too.

Hence, option (a) is the correct one.

Note: Except for histamine, all the other options in the question were drugs. Vernal and Equanil are tranquilizer drugs. Novestrol is not a tranquilizer drug.