question: Q:A 57-year-old woman undergoes an operation for a long-term toxic multinodular goiter. 13 hours after the procedure, she complains of tingling around her lips and difficulty breathing. While measuring her blood pressure, her hand turned as seen in the picture. On physical examination, she looks anxious and her chest is wheezy on both sides. Which of the following is the best initial treatment of this patient?? 
  {'A': 'Oral calcium and calcitriol', 'B': 'Human recombinant parathyroid hormone (PTH)', 'C': 'Oral magnesium', 'D': 'Intravenous calcium gluconate', 'E': 'Thiazide diuretic'},