Question

Which of the following is not a broad-spectrum antibiotic?

• A. Vancomycin
• B. Penicillin G
• C. Ofloxacin
• D. Ampicillin

Answer 1

The correct option is B Penicillin G

Broad-spectrum antibiotics : An antibiotic that is effective against a wide range of bacteria, both gram-positive and gram-negative
Narrow-spectrum antibiotics : Antibiotics that kill just gram-positive or gram-negative bacteria or could be specific to one type of bacteria.
Penicillin G is a narrow spectrum antibiotic.