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 of the following rubber dam frame does not interfere while taking radiograph? \nSelect and explain. \nA. Metal frame, B. Plastic frame, C. Young's frame, D. None of the above", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Because it is shield-shaped and made up of radiolucent material.', 'role': 'assistant'}]