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': 'The greatest stress which may be produced in a material such that stress is directly proportional to the strain is known as: \nSelect and explain. \nA. The elastic limit, B. The proportional limit, C. The yield strength, D. Modulus of elasticity', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Proportional limit—Magnitude of elastic stress above which plastic deformation occurs.\nThe greatest stress which may be produced in a material such that stress is directly proportional to the strain is known as the proportional limit.\nReference: PHILLIPS’ SCIENCE OF DENTAL MATERIALS, 12th ed page no 48', 'role': 'assistant'}]