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': 'Note true about Japanese encephalitis \nSelect and explain. \nA. Transmitted by culex mosquito, B. Caused by group A arbovirus, C. Pig is amplifier host, D. Man is incidental host', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. b. Caused by group A arbovirus', 'role': 'assistant'}]