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': 'Carcinoid tumor develops from - \nSelect and explain. \nA. Enterochromaffin cells, B. Neuroectoderm, C. J cells, D. Goblet cells', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Enterochromaffin cells give rise to carcinoid tumors.', 'role': 'assistant'}]