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': 'A High Tracing Device is used for \nSelect and explain. \nA. Extra oral graphic tracings, B. Intra oral graphic tracings, C. Cephalometric tracings, D. Determining focal forms', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]