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
Most common cause of acute otitis media - 
Select and explain. 
A. H. influenza, B. Strepto-pneumoniae, C. Staph aureus, D. Pseudomonas
B: Strepto-pneumoniae
Answer: B: Strepto-pneumoniae 
Explanation: Ans. is 'b' i.e., Strepto-pneumoniae o The most common causative organism is streptococcus pneumoniae. Other common organisms are H. influenzae and Moraxella catarrhalis. Less common causative organisms are streptococcus pyogenes, staphylococcus aureus and E.coli.