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': '................ are fundamentally dual monocular\ntelescopes with side by side lenses convergent to focus on the operative field \nSelect and explain. \nA. Loupes, B. Cameras, C. Spectacles, D. Lenses', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]