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: Physiology
[{'content': 'True about inspiration;the intrapleural pressure becomes- \nSelect and explain. \nA. More –ve, B. More +ve, C. Same, D. Initially positive, then negative', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The intrapleural pressure becomes more negative at the end of inspiration and less negative at expiration. It ranges between -3 and -6 mmHg.', 'role': 'assistant'}]