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 one of the following is not a feature of DiGeorge syndrome \nSelect and explain. \nA. Congenital heart defects, B. Abnormalities of palate, C. Hypocalcemia, D. Rocker bottom feet', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Rocker bottom feet is a feature of Edward and Patau\xa0syndrome.', 'role': 'assistant'}]