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
An infant with a past history of ear infection is suspected to have meningitis. Organism commonly responsible for such a presentation would be: 
Select and explain. 
A. Haemophilus influenzae, B. Moraxella catarrhalis, C. Pseudomonas, D. Streptococcus pneumoniae
D: Streptococcus pneumoniae
Answer: D: Streptococcus pneumoniae 
Explanation: Meningitis is the most common intracranial complication of otitis media Most common organism causing acute suppurative otitis media in infants & young children are streptococcus pneumonia (30%), Haemophilus influenza (20%) and Moraxella catarrhalis (12%).