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': 'Polycarboxylate cement adhesive failure is most\ncommonly at \nSelect and explain. \nA. Cement prosthesis interface, B. Cement tooth interface, C. Fracture through cement, D. cement tooth interface', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]