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': 'What is the polymerization shrinkage if 3:1 powder: liquid ratio is used? \nSelect and explain. \nA. 6%, B. 8%, C. 10%, D. 21%', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]