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
Which of the following organism is the most common cause of Acute otitis media in children? 
Select and explain. 
A. Staphylococcus aureus, B. Moraxella catarrhalis, C. Haemophilus Influenzae, D. Streptococcus pneumoniae
D: Streptococcus pneumoniae
Answer: D: Streptococcus pneumoniae 
Explanation: Streptococcus pneumoniae is the most common organism causing acute otitis media. It accounts for roughly 30% of the cases. Other causative organisms includes Haemophilus influenzae (20%) Moraxella catarrhalis (12%), Streptococcus pyogenes and Staphylococcus aureus.