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
ACTH reserve is best assessed by which test 
Select and explain. 
A. CRH test, B. Glucocorticoids levels, C. Insulin-induced hypoglycemia, D. ACTH stimulation test
C: Insulin-induced hypoglycemia
Answer: C: Insulin-induced hypoglycemia 
Explanation: ACTH reserve is most reliably assessed during insulin-induced hypoglycemia.