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': 'ACTH reserve is best assessed by which test \nSelect and explain. \nA. CRH test, B. Glucocorticoids levels, C. Insulin-induced hypoglycemia, D. ACTH stimulation test', 'role': 'user'}, {'content': 'Answer: C \nExplanation: ACTH reserve is most reliably assessed during insulin-induced hypoglycemia.', 'role': 'assistant'}]