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': 'Causative organism of SARS - \nSelect and explain. \nA. H1N1, B. Corona virus, C. Rotavirus, D. RSV', 'role': 'user'}, {'content': "Answer: B \nExplanation: Severe Acute Respiratory syndrome was caused by coronavirus. REF:ANANTHANARAYAN AND PANIKER'S TEXTBOOK OF MICROBIOLOGY 9TH EDITION PAGE NO-560", 'role': 'assistant'}]