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: Dental
[{'content': 'Ameloblasts are derived from: \nSelect and explain. \nA. Inner enamel epithelium., B. Outer enamel epithelium., C. Reduced enamel epithelium., D. All of the above.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Enamel organ is derived from the inner enamel epithelium of the enamel organ.', 'role': 'assistant'}]