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': 'Biomechanism that unites the epithelium to the tooth surface is \nSelect and explain. \nA. Internal basal Lamina, B. Junctional epithelium, C. Reduced enamel epithelium, D. Epithelial attachment', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]