This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': 'The commonest cause of acute otitis media in children is \nSelect and explain. \nA. H influenza, B. S pneumonia, C. S aureus, D. Pseudomonas', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The commonest cause of Acute otitis media is Streptococcus pneumoniae in all age groups.Other agents- H. Influenzae, Moraxella catarrhalis, and Pseudomonas.Ref: Hazarika; 3rd ed; Pg: 149', 'role': 'assistant'}]