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: None