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
Chemoprophy laxis with tetracycline is useful in which of the following ? 
Select and explain. 
A. Cholera, B. Brucellosis, C. Meningitis, D. Leptospirosis
A: Cholera
Answer: A: Cholera 
Explanation: Ans. is 'a' i.e., Cholera o Tetracycline is the drug of choice for chemoprophylaxis in cholera and plague.