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 among the following is the abductor of vocal cord? \nSelect and explain. \nA. Posterior cricoarytenoid, B. Cricothyroid, C. Interarytenoid, D. Lateral cricoaretynoid', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The posterior cricoarytenoid is the only abductor of the vocal cords. The major abductors of the vocal cords are the lateral cricoarytenoid, thyroarytenoid, and arytenoideus muscles.', 'role': 'assistant'}]