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': 'Commonest cause for 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: Most common organisms in infants and young children are Streptococcus pneumonia (30 c/o ), Haemophilus influenza(20%) and Moraxella catarrhalis(12%). Other organisms include Streptococcus pyogenes, Staphylococcus aureus and sometimes Pseudomonas aeruginosa. (Ref: Textbook of diseases of ENT, PL Dhingra, 7th edition, pg no. 67)', 'role': 'assistant'}]