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: Anatomy
[{'content': 'Cricothyroid muscle is: \nSelect and explain. \nA. An abductor of vocal cords, B. An abductor of vocal cords, C. A tensor of vocal cords, D. It is supplied by recurrent laryngeal nerve', 'role': 'user'}, {'content': 'Answer: C \nExplanation: A tensor of vocal cords', 'role': 'assistant'}]