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: Dental
[{'content': "Simian crease is seen in: \nSelect and explain. \nA. Down's syndrome, B. Trisomy of chromosome No.13, C. Cri-du-chat syndrome, D. All of the above", 'role': 'user'}, {'content': "Answer: D \nExplanation: Simian crease is an older name for a condition now more commonly called single transverse palmar\xa0crease. It refers to a single crease across the palm of the hand. In most individuals, there are\xa0two slightly oﬀset creases across the palm. Simian crease is seen in:\n\nDown's syndrome\nTrisomy of chromosome No.13 \nCri-du-chat syndrome", 'role': 'assistant'}]