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: Physiology
[{'content': "All are true about Vitamin D except: \nSelect and explain. \nA. 25-hydroxylation occurs in the liver, B. 1-(x hydroxylation occurs in the kidneys, C. In the absence of sunlight, the minimum daily requirement is 400-600 IU, D. William's syndrome consists of mental retardation, obesity and precocious pubey", 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Williams syndrome consists of mental retardation, obesity & precocious pubey', 'role': 'assistant'}]