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': 'Retardation of skeletal maturity can be caused by all except - \nSelect and explain. \nA. Chronic renal failure, B. Hypothyroidism, C. Protein energy malnutrition (PEM), D. Congenital adrenal hyperplasia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]