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': 'Amount of volumetric polymerization shrinkage seen in composites during curing is: \nSelect and explain. \nA. 0.5-2%, B. 1.7-5.7%, C. 5.2-9.8%, D. 12.8-17.76%', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Linear shrinkage is about 0.2 to 2%.\nVolumetric shrinkage is 1.7-5.7%.\nShrinkage is seen towards the centre in self cure materials and towards the light source in light cure materials.\xa0\nReference\xa0: Nisha Garg 2ND ed Pg: 310', 'role': 'assistant'}]