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': 'For dental amalgam, the elastic modulus and tensile strength is \nSelect and explain. \nA. 40 Gpa and 60 — 100 MPa, B. 21 Gpa and 27 — 55 MPa, C. 350 Gpa and 10 — 120 MPa, D. 360 Gpa and 125 — 130 MPa', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]