This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
Durg of choice for chemoprophylaxis of plague - 
Select and explain. 
A. Erythromycin, B. Cotrimoxazole, C. Tetracycline, D. Sulfadiazine
C: Tetracycline
Answer: C: Tetracycline 
Explanation: Drug of choice for chemoprophylaxis of plague is tetracycline. For adults, the dose is 500 mg 6 hourly for 5 days A cheaper alternative is sulfonamide, 2 to 3 gm daily for 5 to 7 days. Ref: PARK&;S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 23rd edition pg: 296