This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Larynx, Subject name: ENT
[{'content': 'Laryngocele arises from: \nSelect and explain. \nA. Vallecula, B. Laryngeal saccule, C. Laryngeal ventricle, D. Aryepiglottic fold', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Laryngocele is dilatation of laryngeal saccule. It may be congenital or acquired later in life when conditions exist to increase transglottic pressure, e.g. trumpet blower, glass blower or forceful use of voice. It can also occur if saccule is obstructed by laryngeal carcinoma.Once distended saccule may also appear outside larynx through thyrohyoid membrane presenting as an external laryngocele.Vallecula and aryepiglottic folds are common sites for laryngeal cysts due to blockage of ducts of mucous secreting glands.', 'role': 'assistant'}]