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: Microbiology
[{'content': "All are true about Influenza virus except \nSelect and explain. \nA. Influenza A is m/c cause of outbreak, B. Incubation period is 2-3 weeks, C. Type-B cause Reye's syndrome, D. Influenza possess two glycoprotein antigens", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Incubation\xa0period of\xa0\xa0Influenza is 18 - 72 hours.', 'role': 'assistant'}]