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: Pediatrics
[{'content': "Which one of the following is a distinguishing feature of Edward's syndrome \nSelect and explain. \nA. Hypotonia, B. Hypotelorism, C. Holoprosencephaly, D. Rocker bottom feet", 'role': 'user'}, {'content': "Answer: D \nExplanation: Rocker bottom foot, also known as congenital vertical talus, is an anomaly of the foot.\nIt is characterized by a prominent calcaneus (heel bone) and a convex rounded bottom of the foot.\nIt gets its name from the foot's resemblance to the bottom of a rocking chair.", 'role': 'assistant'}]