This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
Insulin stress test assay estimates - 
Select and explain. 
A. Diabetes mellitus, B. Growth hormone, C. Glucagon assay, D. Catecholaines
B: Growth hormone
Answer: B: Growth hormone 
Explanation: An insulin tolerance test (ITT) is a medical diagnostic procedure during which insulin is injected into a patient's vein, after which blood glucose is measured at regular intervals. Normally, both coisol and GH serve as counterregulatory hormones, opposing the action of insulin, i.e. acting against the hypoglycemia . When used to assess insulin sensitivity, a standard dose of insulin is administered, and blood glucose is monitored with frequent sampling; the plasma glucose disappearance rate (KITT) indicates the degree of whole-body insulin sensitivity . Ref - pubmed.com