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
Commonest cause for acute otitis media in children is 
Select and explain. 
A. H influenza, B. S pneumonia, C. S aureus, D. Pseudomonas
B: S pneumonia
Answer: B: S pneumonia 
Explanation: 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)