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: Pharmacology
[{'content': 'In the treatment of congenital adrenal hyperplasia due to lack of 21 β–hydroxylase, the purpose of administration of a synthetic glucocortocoid is: \nSelect and explain. \nA. Inhibition of aldosterone synthesis, B. Prevention of hypoglycemia, C. Recovery of normal immune function, D. Suppression of ACTH secretion', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]