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': 'Success of revascularization therapy is mainly dependent \non \nSelect and explain. \nA. Age of patient, B. Complete disinfection of canal, C. Periapical status, D. Occlusal clearance', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]