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: Medicine
[{'content': 'Acute meningitis in adolescents and young adults is caused by - \nSelect and explain. \nA. N. meningitidis, B. H. Influenzae, C. Streptococcus, D. E. coli', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]