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
Persistant the cultures in a root canal is mostly due to 
Select and explain. 
A. Seepage of saliva, B. Excessive instrumentation, C. Less medicament, D. Via apical foramina
A: Seepage of saliva
Answer: A: Seepage of saliva 
Explanation: None