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': 'Type 1 thyroplasty is true \nSelect and explain. \nA. Lateralisation of vocal cord, B. Medialisation of vocal cord, C. Vocal cord shortening, D. Vocal cord Lenhtheninh.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Medialisation of vocal cord, used in unilateral complete vocal palsy.\n4 types of Thyroplaty.\n\np - Type 1 - Proximalisation / medialise of VC in u/c complete palsy.\nLa - Type 2 - Lateralisation of VC.\nS - type 3 - shortening of UC / relaxing of UC, used in puberophonia .\nTy - type 4 - Tightening of VC used in androphonia[Female with low pitch voice.', 'role': 'assistant'}]