Commonest cause of death in penetrating injury of chest -
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.
Tracheobronchial injury
Oesophageal rupture
Pulmonary laceration
Chylothorax