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
[{'content': 'The muscle responsible for falsetto voice of puber phonia is \nSelect and explain. \nA. Vocalis, B. Thyroarytenoid, C. Posterior cricoarytenoid, D. Cricothyroid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Cricothyroid is the main tensor responsible for the falsetto voice in puberphonia. There is hyperkinetic function and spasm of cricothyroid muscle. Ref:- TB of ENT Hazarika; pg num:- 636', 'role': 'assistant'}]