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': 'Over jet is defined as: \nSelect and explain. \nA. Horizontal overlap, B. Vertical overlap, C. Transverse plane discrepancy, D. All the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]