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': 'Rugae area is a \nSelect and explain. \nA. Primary stress bearing area, B. Secondary stress bearing area, C. Relief area, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In the area of rugae, the palate is set to an angle and is covered by thin tissue, making it a secondary stress bearing area.', 'role': 'assistant'}]