This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy of Larynx, Subject name: ENT
Which of the following intrinsic laryngeal muscles is NOT derived from branchial arch VI: 
Select and explain. 
A. Cricoarytenoid muscle, B. Interarytenoid muscle, C. Thyroarytenoid muscle, D. Cricothyroid muscle
D: Cricothyroid muscle
Answer: D: Cricothyroid muscle 
Explanation: Ans. (d) Cricothyroid muscleRef: Inderbir Singh's Embroyology, 7th ed. /119-120* All intrinsic laryngeal muscles is derived from branchial arch VI EXCEPT cricothyroid muscle.* Cricothyroid muscle is derived from branchial arch IV.