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': 'Shrink free ceramic is known as? \nSelect and explain. \nA. Cerestore, B. Captek, C. IPS Empress, D. Dicor', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]