This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Eye, Nose and Ear, Subject name: Anatomy
[{'content': 'Which of the following aery is NOT ligated in a case of epistaxis? \nSelect and explain. \nA. Anterior ethmoidal aery, B. Maxillary aery, C. Internal carotid aery, D. External carotid aery', 'role': 'user'}, {'content': "Answer: C \nExplanation: Internal carotid aery shouldn't be ligated in epistaxis due to risk of development of collateral blood flow into pseudoaneurysm leading to recurrent epistaxis. Aeries which can be ligated in a case of epistaxis are: Anterior and posterior ethmoidal aery, sphenopalatine aery (SPA). More rarely the internal maxillary aery or the External Carotid Aery can be ligated.", 'role': 'assistant'}]