This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Trauma, Subject name: Surgery
[{'content': 'The probable cause of sudden death in a case superficial Injury to neck is : \nSelect and explain. \nA. Injury to phrenic nerve, B. Air embolism through external jugular vein, C. Bleeding from subclavian artery, D. Injury to trachea', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Air embolism through external jugular vein* Air gets sucked inside due to negative pressure in Major venous injuries in neck', 'role': 'assistant'}]