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': 'High impact resin has? \nSelect and explain. \nA. Polysterene, B. Butadine-Styrene rubber, C. Polyehtyl methacrylate, D. Polyamides', 'role': 'user'}, {'content': 'Answer: B \nExplanation: High impact resin = Butadiene rubber (5 to 10%) in powder', 'role': 'assistant'}]