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': 'Endometrial carcinoma with vaginal metastasis,what FIGO stage would it be : September 2009 \nSelect and explain. \nA. Stage III a, B. Stage III b, C. Stage III c, D. Stage IV a', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: Stage III b', 'role': 'assistant'}]