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': 'What is the main disadvantage of Jiffy dentures? \nSelect and explain. \nA. Good esthetics cannot be achieved, B. They take a long time to fabricate, C. Materials used are not durable, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Jiffy dentures refers to a type of interim immediate dentures, which are fabricated very quickly using readily available, but temporary materials.', 'role': 'assistant'}]