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 40 year old male patient came for a routine dental checkup. Intra-oral examination reveals multiple teeth restored with silver amalgam restoration and glass ionomer base. The compressive strength of the base used in this patient is: \nSelect and explain. \nA. 100 MPa, B. 77 MPa, C. 120 MPa, D. 90 MPa', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]