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': 'In a case of endometrial cancer, if metastasis is seen in the vagina, what FIGO stage it would be : \nSelect and explain. \nA. Stage III a, B. Stage III b, C. Stage III c, D. Stage IV a', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Stage IV a', 'role': 'assistant'}]