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': 'Which is the only muscle that is located on the external aspect of larynx? \nSelect and explain. \nA. Cricothyroid, B. Lateral cricoarytenoid, C. Thyroarytenoid, D. Posterior cricoarytenoid', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Cricothyroid is the only muscle that is located on the external aspect of larynx. it is supplied by the external laryngeal nerve. It is a tensor and mild adductor of the vocal cord. Abductor of vocal cord: Posterior cricoarytenoid Adductors of vocal cord are: Cricothyroid Thyroarytenoids Lateral cricoarytenoid Transverse arytenoids Relaxant of vocal cords: Vocalis Thyroarytenoid', 'role': 'assistant'}]