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: Unknown
[{'content': 'Blood supply of the tonsil is all except: \nSelect and explain. \nA. Ascending pharyngeal Artery, B. Sphenopalatine artery, C. Facial artery, D. Descending palatine artery', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Arterial supply of tonsil.', 'role': 'assistant'}]