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': 'House classification is based on \nSelect and explain. \nA. Mental attitude of patient, B. Type of alveolar ridge, C. Maxilla and mandible relation, D. None of above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]