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 most common coupling agents are organic silicon compounds called \nSelect and explain. \nA. parabane, B. ligane, C. silane, D. chelane', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]