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 patient presents with breast ca. Inspection shows Peaud' orange appearance. What is the T stage of the tumor: \nSelect and explain. \nA. T2, B. T3, C. T4a, D. T4b", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]