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: Medicine
[{'content': 'Which of the following colonic polyps is not pre-malignant - \nSelect and explain. \nA. Juvenile polyps, B. Hamartomatous polyps associated with Peutz-Jeghers syndrome, C. Villous adenomas, D. Tubular adenomas', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]