This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Facial Injuries and Abnormalities, Subject name: Surgery
[{'content': 'A 72-year-old man presents to the emergency depament complaining of frequent nose-bleeds. What is the most likely site of acute epistaxis? \nSelect and explain. \nA. Turbinate, B. Septum, C. Maxillary sinus, D. Ethmoid sinus', 'role': 'user'}, {'content': "Answer: B \nExplanation: The most common source of epistaxis is Kisselbach's vascular plexus on the anterior nasal septum. Predisposing factors include foreign bodies, forceful nose-blowing, nose-picking, rhinitis and deted septum", 'role': 'assistant'}]