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': 'All are true about external laryngocele except: \nSelect and explain. \nA. Produces a swelling in the neck on Valsalva, B. Communicates with laryngeal ventricle, C. Can be seen on CT, D. Herniates through cricothyroid membrane', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A laryngocele is an air sac formed by dilatation and prolongation of laryngeal saccule and is in communication with the ventricle. It herniates through thyrohyoid membrane.', 'role': 'assistant'}]