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': 'Which of the following test is useful to distinguish between Insulinoma and Sulfonylurea related hypoglycemia: \nSelect and explain. \nA. Antibody to Insulin, B. Plasma - C- peptide level, C. Plasma Insulin level, D. None', 'role': 'user'}, {'content': "Answer: D \nExplanation: Answer is None (None of the above): Insulinomas and Sulfonylureas, both produce endogenous hyperinsulinemia leadink to the same biochemical pattern. These can only be distinguished by directly measuring the drug concentration of sullOnylureas in the plasma 'It is necessary to screen the plasma for sulphonylureas and other insulin secretagogues (repaglinide, nateglinide) at the time of hypoglycemia since these produce an insulin, C- peptide,, proinsulin and glucose pattern, indistinguishable from that produced by an insulinoma' - Harrison Biochemical Patterns In Patients With Various Causes Of Hyperinsulinemic Hypoglycmia", 'role': 'assistant'}]