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
Which serotype of A. Actnomycetemcomitans is associated with LAP. 
Select and explain. 
A. Serotype a, B. Serotype b, C. Serotype c, D. Serotype d
B: Serotype b
Answer: B: Serotype b 
Explanation: None