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: ENT
Excessive hemorrhage from tonsillectomy is due to injury of the - 
Select and explain. 
A. Paratonsillar vein, B. Ascending palatine artery, C. Rheumatic tonsillitis, D. Physiological enlargement
A: Paratonsillar vein
Answer: A: Paratonsillar vein 
Explanation: "Excessive bleeding at the time of operation usually arises because of trauma to an aberrant vessel or paratonsillar vein"