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
Type I thyroplasty is for - 
Select and explain. 
A. Vocal cord medialization, B. Vocal cord lateralization, C. Vocal cord shortening, D. Vocal cord lengthening
A: Vocal cord medialization
Answer: A: Vocal cord medialization 
Explanation: Type 1: Medial displacement of vocal cord (done by injection of gel foam/Teflon paste)
Type 2: Lateral displacement of the cord (done to improve the airway).
Type 3: Shortening (relax) the cord, to lower the pitch (gender transformation from female to male).
Type 4: Lengthening (tightening) the cord, to elevate the pitch (gender transformation from male to female).