Identify the hormone from the following.

Novestrol

The correct answer is Option (2) → Novestrol.

Let us go through each of the options and explain why Novestrol is the correct answer as a hormone.

1. Bithional:

Bithional is not a hormone. It is a chemical compound used as an antiseptic and an antibacterial agent. It is commonly added to soaps to inhibit the growth of microorganisms. Therefore, this option does not relate to hormones.

2. Novestrol (Norethisterone):

Novestrol, or Norethisterone, is a synthetic progestogen. Progestogens are a class of hormones that are similar to the naturally occurring hormone progesterone, which plays a key role in regulating the menstrual cycle and maintaining pregnancy

Novestrol is used in hormone replacement therapy, contraceptive pills, and sometimes to treat menstrual disorders. It helps regulate reproductive functions in the body, which is why it is classified as a hormone.

3. Prontosil:

Prontosil is not a hormone. It was the first sulfonamide antibiotic, historically important for treating bacterial infections. Prontosil does not have any hormonal function or action.

4. Tegamet (Cimetidine):

Tegamet, or Cimetidine, is not a hormone. It is an \(H_2\) receptor antagonist, a class of drugs used to reduce the production of stomach acid. It is typically used to treat peptic ulcers and acid reflux disease. It works by blocking histamine action on stomach cells, reducing acid secretion, but it does not act as a hormone.

Conclusion:

Among the given options, Novestrol is the only hormone because it is a synthetic progestogen, which is used in hormone therapies to regulate menstrual cycles and prevent pregnancy. The other compounds do not have any hormonal action.