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': 'On colonoscopy which of the following is highly malignant - \nSelect and explain. \nA. Single pedunculated polyp, B. Multiple flat polyp about hundreds, C. Multiple pedunculated polyp, D. Solitary flat polyp', 'role': 'user'}, {'content': 'Answer: B \nExplanation: • Also referred to as Bannayan-Zonana syndrome, Ruvalcaba-Riley smith syndrome, and Bannayan-Riley-Ruvalcaba syndrome.\n• Characterized by hamartomatous polyposis and OLD HM-2.\nOLD HM-2 :\n• Ocular abnormalities, Lipomas, Developmental abnormalities.\n• Hashimoto’s thyroiditis, Hyperpigmentation of penis.\n• Macrocephaly, Mental retardation.\n• No increased risk of colorectal carcinoma, other gastrointestinal or extraintestinal malignancy.', 'role': 'assistant'}]