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': 'Injury to superior laryngeal nerve causes: \nSelect and explain. \nA. Hoarseness, B. Paralysis of vocal cords, C. No effect, D. Loss of timbre of voice', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is d e. Loss of timbre of voice Paralysis of Superior Laryngeal Nerve -causes paralysis of cricothyroid muscle which is a tensor of vocal cord. Clinical Features Voice is weak and pitch cannot be raised. U/L Anaesthesia of larynx above the level of vocal cords causing occasional aspiration.', 'role': 'assistant'}]