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: ENT
All are paired cartilage of larynx except - 
Select and explain. 
A. Arytenoid, B. Corniculate, C. Cuneiform, D. Cricoid
D: Cricoid
Answer: D: Cricoid 
Explanation: Unpaired : - Thyroid, cricoid, epiglottis.
Paired : - Arytenoid, Corniculate, cuneiform