<prompt> A lady with a long stading thyroid nodule is planned for a subtotoal thyroidectomy. Before the surgery the surgeon must check doSerum Calcium levelsSerum PTH assayIndirect LarngoscopyIodine 131 scan  <response>: Answer- C. Indirect LarngoscopyNerve Damage to recurrent superior laryngeal nerve is a known complication of thyroidectomy.Hence it is impoant to document the state ofthe vocal cords before surgery to prevent litigation liability. 