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 - ye, B. More +ve, C. Same, D. Initially positive, then negative', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. More - ve', 'role': 'assistant'}]