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: Pediatrics
[{'content': 'Most common Organism causing Bronchiolitis \nSelect and explain. \nA. Respiratory syncytial Virus, B. Parainfluenza virus, C. Hemophilius Influenza A, D. Hemophilius Influenza B', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Most common Organism causing Bronchiolitis Respiratory Syncytial Virus.', 'role': 'assistant'}]