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': 'Ectomesenchymal cells closer to the outer margin of the enamel organ will differentiate into: \nSelect and explain. \nA. Dental papilla., B. Dental follicle., C. Dental sac., D. None.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ectomesenchymal cells closer to inner margins of enamel organ will differentiate - Dental papilla\xa0\nEctomesenchymal cells\xa0closer to outer margins of enamel\xa0organ will differentiate - Dental follicle.', 'role': 'assistant'}]