This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: AIIMS 2017, Subject name: Surgery
Most common cause of recurrent laryngeal nerve palsy is: 
Select and explain. 
A. Bronchogenic carcinoma, B. Thyroid surgery, C. Mediastinal tumors, D. Pancoast tumor
B: Thyroid surgery
Answer: B: Thyroid surgery 
Explanation: "Previous surgery, mostly thyroid surgery, is the most common cause of laryngeal nerve paralysis. Revision thyroidectomy bears a paicularly high risk for inferior and superior laryngeal nerve trauma." - Surgery of Larynx and Trachea by Marc Remacle (2015)/ p271