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 inclination of teeth towards Frankfort horizontal plane in Simon's classification is \nSelect and explain. \nA. Attraction, B. Protraction, C. Retraction, D. Distraction", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]