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': 'An ideal result of endodontic treatment is deposition of which of the following at the apex: \nSelect and explain. \nA. Bone, B. Cementum deposition, C. Dentin, D. Periodontal ligment', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]