Which one of the following is an antibiotic drug?

Correct answers: (c) Chloramphenicol or (e) None of the above/More than one of the above

Explanation

Chloramphenicol is an antibiotic used against bacterial infections. Sulfaguanidine is a sulfonamide, a synthetic antibacterial drug, and the book counts it too, so it gives "More than one of the above".

Quinine treats malaria, and aspirin relieves pain and fever.

In the strict sense (a substance made by a microorganism), only chloramphenicol is an antibiotic; the book also counts sulfaguanidine and gives (e). Both are accepted here.