Question:
Which of the following are broad spectrum antibiotics?
\[
\begin{aligned}
\text{I.} \quad & \text{Chloramphenicol} \\
\text{II.} \quad & \text{Penicillin-G} \\
\text{III.} \quad & \text{Ofloxacin}
\end{aligned}
\]
The correct answer is
Which of the following are broad spectrum antibiotics?
\[
\begin{aligned}
\text{I.} \quad & \text{Chloramphenicol} \\
\text{II.} \quad & \text{Penicillin-G} \\
\text{III.} \quad & \text{Ofloxacin}
\end{aligned}
\]
The correct answer is
Show Hint
\textbf{Broad-spectrum antibiotics:}
\begin{itemize}
\item Chloramphenicol
\item Tetracycline
\item Ampicillin
\item Ofloxacin
\end{itemize}
\textbf{Narrow-spectrum antibiotic:}
Penicillin-G
Updated On: Jul 9, 2026
- I, III only
- I, II, III
- I, II only
- I only \bigskip
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Analyse each antibiotic.
• Chloramphenicol is a broad-spectrum antibiotic. \checkmark
• Penicillin-G is mainly effective against Gram-positive bacteria and is therefore a narrow-spectrum antibiotic. \(\times\)
• Ofloxacin is a fluoroquinolone and is a broad-spectrum antibiotic. \checkmark
Step 2: Final conclusion. The broad-spectrum antibiotics are \[ \boxed{\text{I and III only}.} \] Hence, the correct option is \(\boxed{(A)}\).
• Chloramphenicol is a broad-spectrum antibiotic. \checkmark
• Penicillin-G is mainly effective against Gram-positive bacteria and is therefore a narrow-spectrum antibiotic. \(\times\)
• Ofloxacin is a fluoroquinolone and is a broad-spectrum antibiotic. \checkmark
Step 2: Final conclusion. The broad-spectrum antibiotics are \[ \boxed{\text{I and III only}.} \] Hence, the correct option is \(\boxed{(A)}\).
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