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
Treatment of Puberphonia is 
Select and explain. 
A. Thyroplasty type I, B. Thyroplasty type II, C. Thyroplasty type III, D. Thyroplasty type IV
C: Thyroplasty type III
Answer: C: Thyroplasty type III 
Explanation: Normally, childhood voice has a higher pitch. When the larynx matures at pubey, vocal cords lengthen and the voice changes to one of lower pitch. This is a feature exclusive to males. Failure of this change leads to persistence of childhood high-pitched voice and is called puberophonia. Type III Thyroplasty- It is used to shoen (relax) the vocal cord. Relaxation of vocal cord lowers the pitch. This procedure is done in mutational falsetto or in those who have undergone gender transformation from female to male. Ref: PL Dhingra Textbook of Ear, Nose and Throat, Edition 6, page - 302