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': 'International disease surveillance is for \nSelect and explain. \nA. Hepatitis, B. TB, C. Polio, D. Leprosy', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Diseases under WHO surveillance\xa0\n\nPolio\nRabies\nRelapsing fever\nInfluenza\nSalmonella\nMalaria\nLouse born typhus', 'role': 'assistant'}]