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
[{'content': 'Excessive hemorrhage from tonsillectomy is due to injury of the - \nSelect and explain. \nA. Paratonsillar vein, B. Ascending palatine artery, C. Rheumatic tonsillitis, D. Physiological enlargement', 'role': 'user'}, {'content': 'Answer: A \nExplanation: "Excessive bleeding at the time of operation usually arises because of trauma to an aberrant vessel or paratonsillar\xa0vein"', 'role': 'assistant'}]