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 of the following is the abductor of vocal cords? \nSelect and explain. \nA. Lateral cricoarytenoid, B. Posterior cricoarytenoid, C. Anterior cricoarytenoid, D. Cricothyroid', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Muscles acting on vocal cords: Abductor of vocal cord: Posterior cricoarytenoid Adductors: Lateral cricoarytenoid, interarytenoid (transverse arytenoid), thyroarytenoid (external pa Tensors: Cricothyroid vocalis (internal pa of thyroarytenoid)', 'role': 'assistant'}]