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': 'A restorative material which has a high proportional limit, compared with one with a lower proportional limit would have: \nSelect and explain. \nA. Greater ductility, B. Greater toughness, C. A higher modulus of elasticity, D. More resistance to permanent deformation', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Proportional limit—Magnitude of elastic stress above which plastic deformation occurs.\nA restorative material which has a high proportional limit, compared with one with a lower proportional limit would have more resistance to permanent deformation.\nReference: PHILLIPS’ SCIENCE OF DENTAL MATERIALS, 12th ed page no 48', 'role': 'assistant'}]