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': 'Suburethral metastasis is seen in : \nSelect and explain. \nA. Carcinoma cervix, B. Carcinoma endometrium, C. Choriocarcinoma, D. Vaginal carcinoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Carcinoma endometrium', 'role': 'assistant'}]