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: ENT
[{'content': 'Paranasal sinuses are ventilated during \nSelect and explain. \nA. Inspiration, B. Expiration, C. Mid inspiration, D. deep inspiration', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]