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': 'After an inlay preparation which of the following would be most appropriate to expose margins for an elastic impression? \nSelect and explain. \nA. Surgical intervention, B. Packing with cord impregnated with alum or epinephrine, C. Packing with cord impregnated with Zinc chloride, D. Packing with Zinc oxide eugenol', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]