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
The probable cause of sudden death in a case superficial Injury to neck is : 
Select and explain. 
A. Injury to phrenic nerve, B. Air embolism through external jugular vein, C. Bleeding from subclavian artery, D. Injury to trachea
B: Air embolism through external jugular vein
Answer: B: Air embolism through external jugular vein 
Explanation: Ans. (b) Air embolism through external jugular vein* Air gets sucked inside due to negative pressure in Major venous injuries in neck