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': 'Mouth breathing is an example of \nSelect and explain. \nA. Compulsive habit, B. Non pressure habit, C. Meaningful habit, D. Useful habit', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Non pressure habits are habits, which do not apply a direct force on the teeth or its supporting structure. Mouth breathing is an example of non pressure habit.', 'role': 'assistant'}]