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': "Will's gauge is used to measure \nSelect and explain. \nA. Vertical height, B. Bi-zygomatic width, C. Inter condylar distance, D. Inter papillary width", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]