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': 'Articular surface of condyle is angulated at________ degrees to the plane of occlusion: \nSelect and explain. \nA. 15 degrees, B. 20 degrees, C. 25 degrees, D. 30 degrees.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]