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
[{'content': 'The best approach to prevent cholera epidemic in a community is \nSelect and explain. \nA. Mass chemoprophylaxis with tetracycline, B. Vaccination of all individuals, C. Health education, D. Safe water and sanitation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: • Pattenkoffer advocated for improving local sanitary conditions as ‘the best way to prevent or stop cholera epidemics.’\n• Robert Koch believed that quarantine and disinfection can only prevent cholera.', 'role': 'assistant'}]