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': "Face bow is used to transfer: \nSelect and explain. \nA. Axis-orbital plane, B. Frankfort horizontal plane, C. Camper's plane, D. Occlusal plane", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]