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 drugs is used for fetal therapy of congenital adrenal hyperplasia? \nSelect and explain. \nA. Hydrocortisone, B. Prednisolone, C. Fludrocortisone, D. Dexamethasone', 'role': 'user'}, {'content': "Answer: D \nExplanation: Recommendations for pregnancy at risk consists of administration of dexamethasome a steroid that readily crosses the placenta'", 'role': 'assistant'}]