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': 'Which of the following is not a type of mouth breathing? \nSelect and explain. \nA. Obstructing, B. Anatomical, C. Physiological, D. Habitual', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]