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
H1N1 Is a type of? 
Select and explain. 
A. SARS virus, B. Influenza type A virus, C. Influenza type B virus, D. Influenza type C virus
B: Influenza type A virus
Answer: B: Influenza type A virus 
Explanation: H1N1 include influenza virus types REF:<\p> ANATHANARAYANAN MICROBIOLOGY NINTH EDITION PAGE.499(table.54.2)