This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of Adrenal Gland, Subject name: Medicine
Which of the following is produced by Argentaffinoma of ileum? 
Select and explain. 
A. G.A.B.A, B. Serotonin, C. Epinephrine, D. Nor-epinephrine
B: Serotonin
Answer: B: Serotonin 
Explanation: Argentaffin cells in Carcinoid tumor produce 5HT derivatives like Serotonin. Epinephrine and Norepinephrine are produced by Chromaffin cells which are seen in Pheochromocytoma.