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 casting shrinkage in gold alloys is maximum in \nSelect and explain. \nA. Class II MOD inlays, B. Large class V restoration, C. Class II MO Restoration, D. Class 1 inlay', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]