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 modulus of elasticity is defined as: \nSelect and explain. \nA. The stress at the proportional Limit, B. The strain at the proportional limit, C. The stress to strain ratio within the proportional limit, D. None of the above', 'role': 'user'}, {'content': "Answer: C \nExplanation: Modulus OF Elasticity\nIt is also referred to as 'elastic modulus' or 'Young's modulus'. It represents the relative stiffness or dity of the material within the elastic range. Young's modulus is the ratio of stress to strain. Since stress is proportional to strain (up to the proportional limit),\xa0the stress to strain ratio would be constant.\nModulus of elasticity\nor\nYoung's modulus", 'role': 'assistant'}]