This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (E.N.T.), Subject name: ENT
Acute Otitis media in Children is most commonly due to 
Select and explain. 
A. Morexiello catarrhalis, B. H. influenza, C. Streptococcus pneumoniae, D. Staphylococcus aureus
C: Streptococcus pneumoniae
Answer: C: Streptococcus pneumoniae 
Explanation: (C) Streptococcus pneumoniae # Causative Organisms of ASOM:> Most common organisms in infants and young children are Streptococcus pneumoniae (30%), Haemophilus influenzae (20%) and Moraxella catarrhalis (12%).> Other organisms include Streptococcus pyogenes, Staphylococcus aureus & sometimes Pseudomonas aeruginosa.> In about 18-20%, no growth is seen.> Many of the strains of H. influenzae & Moraxella catarrhalis are ft-lactamase producing.