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
X–ray film should be taken in closed pneumothorax during- 
Select and explain. 
A. Deep expiration, B. Deep inspiration, C. In supine position, D. In lateral position
A: Deep expiration
Answer: A: Deep expiration 
Explanation: Usual chest X-ray is PA view in full inspiration. For pneumothorax PA view in full expiration is the most appropriate view.