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: Medicine
[{'content': 'False about Influenza is \nSelect and explain. \nA. H5N1 is cause of Avian influenza, B. Type A pandemics every 2-3 years, C. Incubation period is 18-72 hours, D. All the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Type A pandemics every 10-15 years.', 'role': 'assistant'}]