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: Surgery
Commonest cause of death in penetrating injury of chest - 
Select and explain. 
A. Tracheobronchial injury, B. Oesophageal rupture, C. Pulmonary laceration, D. Chylothorax
A: Tracheobronchial injury
Answer: A: Tracheobronchial injury 
Explanation: Ans is 'a' ie Tracheobronchial injury Tracheobronchial injuries are so fatal that most pts. die at the scene or during transpo as a result of poor ventilation. The other options are so easy to rule out as they are rarely the cause of death. I could not find the MC cause of death after penetrating injury but among the 4 options provided Tracheobronchial is definitely the right answer. No doubts about it.