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': 'Inclined plane is constructed \nSelect and explain. \nA. 90° to occlusal plane, B. 45° to occlusal plane, C. 30° to occlusal plane, D. 70° to occlusal plane', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]