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
Hoarseness secondary to bronchogenic carcinoma is usually due to extension of the tumour into ? 
Select and explain. 
A. Vocal cord, B. Superior laryngeal nerve, C. Left recurrent laryngeal nerve, D. Right vagus nerve
C: Left recurrent laryngeal nerve
Answer: C: Left recurrent laryngeal nerve 
Explanation: Ans. is 'c' i.e., Left recurrent laryngeal nerve