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 contraction of gold alloys on solidifying is\napproximately: \nSelect and explain. \nA. 0.40%, B. 1.40%, C. 2.40%, D. 3.40%', 'role': 'user'}, {'content': 'Answer: B \nExplanation: All alloys shrink when they change from liquid to solid. The casting shrinkage in gold alloys is less (1.25 to 1.65%) when compared to base metal alloys.\nMannapalli 3 ed page no 276', 'role': 'assistant'}]