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: ENT
Commonest cause of acute otitis media in children is - 
Select and explain. 
A. H. influenza, B. Strepto-pneumoniae, C. Staph aureus, D. Pseudomonas
B: Strepto-pneumoniae
Answer: B: Strepto-pneumoniae 
Explanation: None