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': 'Basal cell carcinomas: \nSelect and explain. \nA. Usually metastasize to regional lymph nodes, B. Common on the face and neck, C. Common in females, D. Radio resistant', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]