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': 'Which of the following is not an injectable molded ceramic: \nSelect and explain. \nA. IPS Empress., B. IPS Empress 2., C. Dicor., D. None.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Dicor is castable ceramic.', 'role': 'assistant'}]