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
Commonest cause of otogenic meningitis is: 
Select and explain. 
A. Streptococcus pneumoniae, B. H. influenza, C. Pseudomonas, D. E. coli
A: Streptococcus pneumoniae
Answer: A: Streptococcus pneumoniae 
Explanation: (a) Streptococcus pneumoniae(Ref. Cummings, 6th ed., 2171)MC cause of otogenic meningitis was H. influenzae but after the introduction of Hib vaccine in the universal immunisation programme, it is Streptococcus pneumoniae now.