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': 'A patient comes to a private physician and diagnosed with TB, within how many days he has to be informed to District Health officer \nSelect and explain. \nA. 10 days, B. 15 days, C. 30 days, D. 45 days', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]