<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 20-year-old man is brought to the emergency room for evaluation of a back injury sustained while at work. A CT scan of the lumbar spine shows an incidental 2-cm mass adjacent to the inferior vena cava. Histologic examination of a biopsy specimen of the mass shows clusters of chromaffin cells. This mass is most likely to secrete which of the following substances?? A: Norepinephrine, B: Cortisol, C: Estrogen, D: Dehydroepiandrosterone, E: Aldosterone,  <response>: This is a question about an incidental finding of a mass near the inferior vena cava on CT scan in a young male patient. The biopsy shows it is composed of chromaffin cells. Chromaffin cells are neuroendocrine cells that synthesize, store, and secrete catecholamines like epinephrine and norepinephrine. Pheochromocytomas are tumors arising from chromaffin cells of the adrenal medulla that secrete excess catecholamines. Therefore, this mass is most likely a pheochromocytoma that is secreting norepinephrine.A: Norepinephrine 