<prompt> A 25-year-old female presents with episodes of bizarre behavior, memory lapse, and unconsciousness. She also demonstrated previously episodes of extreme hunger, sweating, and tachycardia. During one of these episodes, her blood sugar was tested and was found to be 40 mgdL. Which of the following would most appropriately indicate a diagnosis of insulinoma?Demonstration of insulin antibodies in bloodAbnormal glucagon levelCT of the pancreas showing a massHypoglycemia during a symptomatic episode with relief of symptoms by intravenous glucose  <response>: The characteristic features of insulinomas include: a hypoglycemic symptoms; b blood glucose 50 mgdL during the symptomatic episodes; and c relief of symptoms by intravenous injection of glucose Whipples triad. Diagnosis is confirmed by demonstration of fasting hypoglycemia in the presence of inappropriately elevated levels of insulin in the blood. A ratio of plasma insulinglucose 0.3 is diagnostic. Circulating levels of C-peptide are usually elevated in patients with insulinoma but not in patients with such other causes of hypoglycemia as tumors of mesenchymal origin and liver tumors. Patients who surreptitiously administer insulin develop insulin antibodies. 