This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Which of the following is a broad spectrum antibiotic: 
Select and explain. 
A. Erythromycin, B. Streptomycin, C. Tetracycline, D. All
C: Tetracycline
Answer: C: Tetracycline 
Explanation: None