This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urolithiasis, Subject name: Surgery
Radiolucent renal stone 
Select and explain. 
A. Uric acid, B. Calcium oxalate, C. Triple phosphate, D. Calciumphosphate
A: Uric acid
Answer: A: Uric acid 
Explanation: Ans. (a) Uric acidRadiolucent kidney stones are-L.U.XRadio Lucent stones are Uric acid and Xanthine stones