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': 'Classification of partially edentulous arches \nSelect and explain. \nA. Should be universally accepted, B. Should serve as a guide to the type of design to be used, C. Should permit differentiation between tooth supported and tooth & tissue supported partial denture, D. All the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]