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: Dental
[{'content': 'Which serotype of A. Actnomycetemcomitans is associated with LAP. \nSelect and explain. \nA. Serotype a, B. Serotype b, C. Serotype c, D. Serotype d', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]