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
Not true about virulence of endodontic microflora is 
Select and explain. 
A. Endotoxin, B. Exotoxin, C. Bacterial enzymes, D. Microbial interferences
B: Exotoxin
Answer: B: Exotoxin 
Explanation: None