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
Cricoid cartilage is a derivative of which branchial arch? 
Select and explain. 
A. IIIrd arch, B. IVth arch, C. VIth arch, D. Hypobranchial eminence
C: VIth arch
Answer: C: VIth arch 
Explanation: Cricoid is derived from VIth arch. Other cartilages of VIth arch derivation are arytenoids and corniculate.Thyroid and cuneiform cartilages are derived from IVth arch.Epiglottis is derived from hypobranchial eminence and possibly also from ventral ends of IVth arch.