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 third point of reference (common) for a facebow is \nSelect and explain. \nA. Pupil of eye, B. Glabella, C. Infraorbital notch, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]