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
Most common source of hemorrhage during Tonsillectomy 
Select and explain. 
A. Injury to external palatine vein, B. Injury to tonsillar branch of facial artery, C. Injury to tonsillar branch of Ascending pharyngeal artery, D. Injury to tonsillar branch of Lingual artery
A: Injury to external palatine vein
Answer: A: Injury to external palatine vein 
Explanation: M/c cause of hemorrhage during tonsillectomy is external palatine vein / paratonsillar vein.
M/c cause of hemorrhage of arterial origin during tonsillectomy is tonsillar branch of facial artery.