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': 'Cricothyroid muscle is supplied by: \nSelect and explain. \nA. Superior laryngeal nerve, B. External laryngeal nerve, C. Vagus nerve, D. Glossopharyngael nerve', 'role': 'user'}, {'content': 'Answer: A \nExplanation: All the muscles which play any role in movement of vocal cord are supplied by recurrent laryngeal nerve except the cricothyroid muscle which receives its innervation from the external laryngeal nerve - a branch of superior laryngeal nerve.', 'role': 'assistant'}]