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': 'High inguinal orchiectomy specimen showed teratoma testis with involvement of epididymis; stage is \nSelect and explain. \nA. T\n1, B. T\n2, C. T\n3, D. T\n4\nb', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]