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: Surgery
[{'content': 'Odontogenic tumors just 1cm away from lower border \nSelect and explain. \nA. Enbloc resection, B. Hemi mandibulectomy, C. Enucleation, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]