General Medicine General 8672ebc1 A mother brings her 10 year old son to OPD because of a history of medullary carcinoma of thyroid in his father and grandparents. There are no findings on physical examination. Which of the following tests you would perform? A Serum insulin level B Serum glucagon level C Urine vanillylmandelic acid (VMA) level D Serum somatostatin level