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': 'A specimen for a biopsy should be taken from: \nSelect and explain. \nA. Necrotic area, B. Subdermat layer, C. Border of an ulcerated area, D. Center of an ulcerated area', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]