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': 'Earnest Klein has classified habits into \nSelect and explain. \nA. Compulsive and non-compulsive habits, B. Intentional and non-intentional habits, C. Primary and secondary habits, D. Pressure and non-pressure habits', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]