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: Anatomy
Laryngeal membranes are classified into extrinsic and intrinsic. Extrinsic membranes of larynx are all, EXCEPT? 
Select and explain. 
A. Cricothyroid membrane, B. Thyrohyoid membrane, C. Quadrangular membrane, D. Cricotracheal membrane
C: Quadrangular membrane
Answer: C: Quadrangular membrane 
Explanation: Extrinsic membranes of larynx:Thyrohyoid membraneCricothyroid membraneCricotracheal membraneIntrinsic membranes of larynx:Cricovocal membraneQuadrangular membrane