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: Gynaecology & Obstetrics
[{'content': "The treatment of choice in a 56 years old woman with endometrial cancer is : \nSelect and explain. \nA. Irradiation, B. Weheim's hysterectomy, C. Pan hysterectomy, D. Irradiation and later panhysterectomy", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pan hysterectomy', 'role': 'assistant'}]