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 following graph shows linear contraction of four elastomeric\xa0impression materials. Which impression material is represented by red arrow? \nSelect and explain. \nA. Polyether, B. Polysulfide, C. Addition silicone, D. Condensation silicone', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]