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 among the following is not a type of wax: \nSelect and explain. \nA. Casting wax., B. Utility wax., C. Carding wax., D. Japan wax.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Japan wax and cocoa butter are fat.', 'role': 'assistant'}]