This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney & Ureturs, Subject name: Surgery
Chandu, 45-years male shows calcification on the right side of his abdomen in an AP view. In lateral view the calcification is seen to overlie the spine. Most likely diagnosis is: 
Select and explain. 
A. Gallstones, B. Calcified mesenteric nodes, C. Renal stones, D. Calcified rib
C: Renal stones
Answer: C: Renal stones 
Explanation: Ans. (c) Renal stones* Kidney stones are identified opposite 2nd lumbar vertebra" in X-ray KUB* Gall stones are anterior and Kidney stones overlie the lumbar spine in Lateral view.