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': 'Most common cause of death in carcinoma cervix is : \nSelect and explain. \nA. Widespread metastasis, B. Renal failure, C. Operative interference, D. Hazards of radiotherapy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Renal failure', 'role': 'assistant'}]