The correct answer is option 3. A-III, B-IV, C-I, D-II.
Let us go through each substance in List I and its corresponding category in List II:
(A) Ranitidine - (III) Antihistamine
Ranitidine is a medication that belongs to a class of drugs known as H2 blockers. It is commonly used to reduce stomach acid production and treat conditions such as heartburn and peptic ulcers. While it is not a direct antihistamine, it indirectly helps by blocking histamine receptors in the stomach, reducing acid production.
(B) Furacine - (IV) Antiseptic
Furacine, also known as nitrofurazone, is an antibacterial medication used topically as an antiseptic. It is often applied to wounds, burns, and skin infections to prevent or treat bacterial infections. So, it falls under the category of antiseptics.
(C) Phenelzine - (I) Tranquilizer
Phenelzine is a type of antidepressant that belongs to a class of drugs called monoamine oxidase inhibitors (MAOIs). It is used to treat depression and anxiety disorders. While the term "tranquilizer" is somewhat outdated and not commonly used for modern psychiatric medications, phenelzine does have a calming effect and can be considered to have tranquilizing properties.
(D) Chloramphenicol - (II) Antibiotic
Chloramphenicol is a broad-spectrum antibiotic used to treat various bacterial infections. It works by inhibiting protein synthesis in bacteria. Therefore, it is classified as an antibiotic.
So, the correct matching is 3. A-III, B-IV, C-I, D-II | 
