This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiration, Subject name: Pathology
[{'content': 'Carcinoid tumor develops from: \nSelect and explain. \nA. Enterochromaffm cells, B. Neuroectoderm, C. J cells, D. Goblet cells', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Enterochromaffin cells(Ref: R 9th/pg 719-720)Carcinoid tumor develops from Enterochromaffin cells which contains neuroendocrine hormones.', 'role': 'assistant'}]