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: Surgery
[{'content': 'Blow out carotid is characteristically seen with - \nSelect and explain. \nA. Thyroidectomy, B. Radical neek dissection, C. Flap necrosis, D. Sistrunk operation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: History of radiation exposure followed by radical neck dissection increases the risk of carotid blowout in head and neck cancers.\n• Carotid blowout refers to rupture of the carotid and its branches\n• It is one of the most devastating complications associated with therapy for head and neck cancers\n• Carotid blowout tends to occur in head and neck cancer, radiation induced necrosis, recurrent tumors\xa0or pharynocutaneous fistulas\n• The clinical signs and symptoms related to rupture of carotid artery have been referred as carotid blowout syndrome\n• Reported morbidity and mortality rates are 40% and 60% respectively.', 'role': 'assistant'}]