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: Medicine
[{'content': "Abbey's flap is used for reconstruction of - \nSelect and explain. \nA. Breast repair, B. Upper lip repair, C. Cheek repair, D. Nose repair", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]