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': 'Open bite on cephalogram shows as: \nSelect and explain. \nA. Increased MP angle, B. Decreased MP angle, C. Increased ANB angle, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]