This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Electrolyte Imbalance, Subject name: Medicine
Which test can predict the return of renal function in a patient with the tumor lysis syndrome? 
Select and explain. 
A. Serum creatinine, B. Serum phosphate, C. Serum potassium, D. Serum Uric acid
D: Serum Uric acid
Answer: D: Serum Uric acid 
Explanation: Tumor lysis syndrome Renal function recovers after the uric acid level is lowered to <10 mg/dL. Because increased urine flow rates help to inhibit crystal deposition in renal tubules, close monitoring of urine output is necessary to assess the adequacy of hydration.