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': 'The most generally accepted treatment of root fracture\nin the apical third of a maxillary central incisor involves \nSelect and explain. \nA. Splinting with orthodontic bands and a sectional arch wire, B. Frequent pulp testing and radiographic examination, C. Extraction of the tooth, D. Immediate pulp extirpation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]