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': "'H5 Nl' may be best described as a: \nSelect and explain. \nA. Bird flu virus, B. Vaccine for HIV, C. Agent for Japanese encephalitis, D. New strain of Plasmodium falciparum", 'role': 'user'}, {'content': 'Answer: A \nExplanation: H5N1 is the An Flue a type of Influenza A virus, also called the Bird Flu Virus. Ref: Molecular Medicine: An Introductory Text By Trent, 3rd Edition, Pages 209-10; Clinical Infectious Disease By Schlossberg, 2008, Page 1290', 'role': 'assistant'}]