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 side of rubber dam facing occlusal side of isolated teeth is: \nSelect and explain. \nA. Shiny side, B. Dull side, C. Any side, D. Both sides are dull and can be used in either direction', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Rubber dam material has a shiny and dull side.\nBecause the dull side is less light reflective, it is generally placed facing the occlusal of the isolated teeth.', 'role': 'assistant'}]