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: 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: Ans. is 'a' i.e., Streptococcus pneumoniae", 'role': 'assistant'}]