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: Surgery
Vocal cord palsy in thyroid surgery is due to injury to? 
Select and explain. 
A. Superficial laryngeal nerve, B. Recurrent laryngeal nerve, C. Ansa cervicalis, D. Vagus nerve
B: Recurrent laryngeal nerve
Answer: B: Recurrent laryngeal nerve 
Explanation: Ans. is 'b' i.e., Recurrent laryngeal nerve