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: Social & Preventive Medicine
DOC for chemoprophylaxis of plague- 
Select and explain. 
A. Tetracycline, B. Erythromycin, C. Vancomycin, D. Streptomycin
A: Tetracycline
Answer: A: Tetracycline 
Explanation: None