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
[{'content': 'In thyroplasty type 2, vocal cord is - \nSelect and explain. \nA. Lateralized, B. Medialized, C. Shortened, D. Lengthened', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Isshiki divided thyroplasty procedures into 4 categories to produce functional alteration of vocal cords:\n\nType 1 : Medial displacement of vocal cord (done by injection of gel foam/Teflon paste)\nType 2 : Lateral displacement of cord (done to improve the airway)\nType 3 : Shortening (relax) the cord, to lower the pitch (gender transformation from female to male)\nType 4 : Lengthening (tightening) the cord, to elevate the pitch (gender transformation from male to female)', 'role': 'assistant'}]