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
[{'content': 'For controlling an outbreak of cholera, all of the following measures are recommended except - \nSelect and explain. \nA. Mass chemoprophylaxis, B. Proper disposal of excreta, C. Chlorination of water, D. Early detection and management of cases', 'role': 'user'}, {'content': 'Answer: A \nExplanation: <p> Mass chemoprophylaxis. Drugs used are tetracycline or furazolidone. Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:232-233. <\\p>', 'role': 'assistant'}]