<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:Six hours after near-total thyroidectomy for Graves disease, a 58-year-old man has not had any urine output. The surgery was successful and the patient feels well except for slight neck pain. He has type 2 diabetes mellitus and hypertension. His father had autosomal dominant polycystic kidney disease. Prior to the surgery, the patient was taking metformin and lisinopril regularly and ibuprofen as needed for headaches. His current medications include acetaminophen and codeine. His temperature is 36.2C 97.2F, pulse is 82min, and blood pressure is 12266 mm Hg. Physical examination shows a 7-cm surgical wound on the anterior neck with mild swelling, but no reddening or warmth. The remainder of the examination shows no abnormalities. Which of the following is the most appropriate next step in management?? A: Obtain renal scintigraphy, B: Obtain urinalysis, C: Perform bedside bladder scan, D: Obtain renal biopsy, E: Administer furosemiden,  <response>: This is a patient who underwent thyroidectomy surgery 6 hours ago and now has not had any urine output. The main concern is acute kidney injury given his risk factors of diabetes, hypertension, family history of polycystic kidney disease, and use of medications like metformin, lisinopril, ibuprofen, and codeine which can affect kidney function. The goal is to determine if he has acute kidney injury and if so, what is the underlying cause. The choices range from tests to evaluate kidney function like renal scintigraphy and biopsy, evaluating for urinary obstruction with bladder scan, and giving a diuretic.Renal scintigraphy and biopsy are invasive and not indicated as initial tests. Bladder scan is appropriate to check for urinary retention. Urinalysis can evaluate for signs of kidney injury. Furosemide may help improve urine output but does not evaluate the underlying cause.C: Perform bedside bladder scan 