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: Radiology
[{'content': 'X–ray film should be taken in closed pneumothorax during- \nSelect and explain. \nA. Deep expiration, B. Deep inspiration, C. In supine position, D. In lateral position', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Usual chest X-ray is PA view in full inspiration. For pneumothorax PA view in full expiration is the most appropriate view.', 'role': 'assistant'}]