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
Change in pitch of sound is produced by which muscle? 
Select and explain. 
A. Post cricoarytenoids, B. Lateral cricoarytenoids, C. Cricothyroid, D. Vocalis
C: Cricothyroid
Answer: C: Cricothyroid 
Explanation: The muscle responsible for charge in pitch of voice is cricothyroid