This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
[{'content': 'H5N1 is strain of - \nSelect and explain. \nA. An flu, B. New vaccine againts AIDS, C. Aent for japanese encephalitis, D. Causes chickengunya fever', 'role': 'user'}, {'content': 'Answer: A \nExplanation: H5N1 is the strain of an influenza REF:<\\p> MICROBIOLOGY ANANTHA NARAYANAN NINTH EDITION PAGE.502', 'role': 'assistant'}]