<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 14-year-old boy is admitted to the emergency department with acute onset of confusion, malaise, diffuse abdominal pain, nausea, and a single episode of vomiting. He denies ingestion of any suspicious foods, fevers, respiratory symptoms, or any other symptoms preceding his current condition. However, he notes an increase in his liquid consumption and urinary frequency over the last 6 months. On physical examination, he is responsive but somnolent. His blood pressure is 9050 mm Hg, heart rate is 101min, respiratory rate is 21min, temperature is 36.0C 96.8F, and SpO2 is 96 on room air. He has facial pallor and dry skin and mucous membranes. His lungs are clear to auscultation, and heart sounds are normal. His abdomen is soft with no rebound tenderness on palpation. Neurological examination is significant for 1 deep tendon reflexes in all extremities. A dipstick test shows 3 for ketones and glucose. The patients blood tests show the following findings:RBCs 4.1 millionmm3Hb 13.7 mgdLHematocrit 56Leukocyte count 7,800mm3Platelet count 321,000mm3Glucose 565 mgdLPotassium 5.8 mEqLSodium 136 mEqLALT 15 ULAST 17 ULAmylase 88 ULBicarbonate 19 mEqLBE 3 mEqLpH 7.3pCO2 37 mm HgpO2 66 mm HgWhich of the medications listed below should be administered to the patient intravenously?? A: Isophane insulin, B: Insulin detemir, C: Cefazolin, D: Regular insulin, E: Potassium chloride,  <response>: Based on the description of a 14-year-old boy with acute confusion, abdominal pain, nausea, vomiting, polyuria, polydipsia, hypotension, tachycardia, dry mucous membranes, Kussmaul breathing, somnolence, ketosis, high blood glucose, high anion gap metabolic acidosis, and normal kidney and liver function tests, this is a clear presentation of diabetic ketoacidosis DKA. The main goals of treatment are to correct dehydration with intravenous fluids, replace insulin to lower blood glucose and ketones, and address electrolyte imbalances. Of the choices given, regular insulin is the most appropriate initial treatment to help reverse the metabolic derangements in DKA. Isophane and detemir insulins are long-acting and not ideal for treating DKA. Cefazolin is an antibiotic and would not address the underlying issue. Potassium should not be given yet since the patient is hyperkalemic at this point.D: Regular insulin 