This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nose and paranasal sinuses, Subject name: ENT
Quadrilateral cailage is attached to all except: 
Select and explain. 
A. Ethmoid, B. Vomer, C. Sphenoid, D. Maxilla
C: Sphenoid
Answer: C: Sphenoid 
Explanation: Quadrilateral cailage or septal cailage forms the nasal septum. As seen in above figure the aerior side of this cailage forms the dorsum of External nose. It comes in contact with perpendicular plate of ethmoid,vomerand aerior nasal spine. Ref.Dhingra 6/e,p 147.