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': 'Which among the following is the only impression material that can be electroplated: \nSelect and explain. \nA. Reversible hydrocolloids., B. Polysulphide polymer., C. Addition silicon., D. Condensation silicon.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]