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 of the following has the highest modulus of elasticity? \nSelect and explain. \nA. Dentin, B. Enamel, C. Amalgam, D. Composite Resin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Enamel is a brittle substance with a comparatively high modulus of elasticity, a low proportional limit in tension, and a low modulus of resilience.\nReference: PHILLIPS’ SCIENCE OF DENTAL MATERIALS, 12th ed page no 67', 'role': 'assistant'}]