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': 'Angle formed between mandibular plane and the long axis of mandibular central incisor is: \nSelect and explain. \nA. 90° ± 5°, B. 25°, C. 120°, D. 80°± 2°', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]