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': 'Stage I seminoma t 12 estis. t/t of choice is - \nSelect and explain. \nA. High inguinal orchidectomy, B. High inguinal orchidectomy and radiotherapy, C. Radiotherapy and Chemotherapy, D. Trans-scrotal orchidectomy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]