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
After thyroidectomy, pt. developed stridor within 2 hrs. All are likely cause of stridor except : 
Select and explain. 
A. Hypocalcemia, B. Recurrent laryngeal nerve palsy, C. Laryngomalacia, D. Wound hematoma
A: Hypocalcemia
Answer: A: Hypocalcemia 
Explanation: None