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 sticky polysaccharide present in dental plague is \nSelect and explain. \nA. Dextran, B. dextrin, C. Glycogen, D. sucrose', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]