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
Bilateral recurrent laryngeal nerve palsy is seen in: 
Select and explain. 
A. Thyroidectomy, B. Carcinoma thyroid, C. Cancer cervical oesophagus, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Causes of bilateral recurrent laryngeal nerve palsy are: Idiopathic Post thyroid surgery Thyroid malignancy Carcinoma of cervical pa of esophagus Cervical Lymphadenopathy Peripheral neuritis causes high vagal palsy which leads to both superior as well as recurrent laryngeal nerve palsy i.e. bilateral complete palsy.