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': "All are seen in Turner's syndrome, except \nSelect and explain. \nA. XO pattern, B. Webbed neck, C. Short stature, D. Mental retardation", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]