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
All are true about external laryngocele except: 
Select and explain. 
A. Produces a swelling in the neck on Valsalva, B. Communicates with laryngeal ventricle, C. Can be seen on CT, D. Herniates through cricothyroid membrane
D: Herniates through cricothyroid membrane
Answer: D: Herniates through cricothyroid membrane 
Explanation: 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.