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: Medicine
While inserting a central venous catheter, a patient develops respiratory distress. The most likely cause is - 
Select and explain. 
A. Hemothorax, B. Pneumothorax, C. Pleural effusion, D. Hypovolumia
B: Pneumothorax
Answer: B: Pneumothorax 
Explanation: None