This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
In a 4 year old child with ASOM the infecting of organism is likely to be – 
Select and explain. 
A. Pneumococcus, B. H.influenza, C. Streptococcus, D. Staphylococcus
A: Pneumococcus
Answer: A: Pneumococcus 
Explanation: Three most common organisms causing ASOM -4 S. pneumoniae (40%), H. influenzae (25-30%), Moraxella, catarrhalis (10-15%)
Note - H.influenzae causing ASOM is nontypable. The incidence of H.influenzae type 'b' has decreased because of widespread use of Hib vaccine.