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: Surgery
[{'content': 'Which of the following is true about risk factor for malignancy in polyp \nSelect and explain. \nA. Pedunculated polyp, B. Villous polyp, C. Tubular polyp, D. Single polyp', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Villous polyp is more pre malignant than tubular polyp.', 'role': 'assistant'}]