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': 'Apical third root fracture in a vital tooth are related by: \nSelect and explain. \nA. Extraction., B. Relieve from occlusion and observe., C. RCT., D. Any of the above.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]