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 Ref: Diseases of Ear, Nose and Throat by PL Dhingra, 4th edition, Page 54, 55.