This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pediatrics
[{'content': 'Most common organism causing meningitis in a 1 year old child \nSelect and explain. \nA. Streptococcus pneumoniae, B. H. influenza, C. Listeria, D. Neisseria meningitidIs', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Streptococcus pneumonia is the most common organism causes meningitis even in the 1 year old child. Reference: GHAI Essential pediatrics, 8th edition', 'role': 'assistant'}]