<prompt> A lady with a long-standing thyroid nodule is planned for a subtotal thyroidectomy. Before the surgery, the surgeon must check do -Serum Calcium levelsSerum PTH assayIndirect LaryngoscopyIodine 131 scan  <response>: Ans. is c i.e., Indirect Laryngoscopy o Nerve Damage to recurrentsuperior 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 