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 linear solidification shrinkage of Type IV Ni-Cr based alloys is \nSelect and explain. \nA. 2.30%, B. 1.56%, C. 1.37%, D. 3%', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]