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: Pathology
[{'content': 'Most common site of gastrointestinal carcinoid is - \nSelect and explain. \nA. Duodenum, B. Appendix, C. Ileo-Jejunum, D. Stomach', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer- C. Ileo-JejunumCarcinoid tumors arise from the neuroendocrine cells (Argentaffin cells or Kulchitsky cells).The majority are found in GI tract, and more than,l0% in small intestine (jejunum & ileum).The tracheobronchial tree and lungs are the next common sites involved.', 'role': 'assistant'}]