This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Evaluation of a Thyroid Nodule, Subject name: Surgery
A lady with a long-standing thyroid nodule is planned for a subtotal thyroidectomy. Before the surgery, the surgeon must check/ do - 
Select and explain. 
A. Serum Calcium levels, B. Serum PTH assay, C. Indirect Laryngoscopy, D. Iodine 131 scan
C: Indirect Laryngoscopy
Answer: C: Indirect Laryngoscopy 
Explanation: Ans. is 'c' i.e., Indirect Laryngoscopy o Nerve Damage to recurrent/superior laryngeal nerve is a known complication of thyroidectomy. Hence it is important to document the state of the vocal cords before surgery to prevent litigation liability