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': "Sharpey's fibres are derived from : \nSelect and explain. \nA. Hertwig's root sheath, B. Epithelial rests of malassez, C. Alveolar bone, D. Dental follicle", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]