This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Chandu, a 45 yrs male shows calcification on the Rt 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: In lateral view the Renal stone lies superimposed on shadow of veebral column while gall stones are seen well infront of the veebral bodies. Ref: Clinical Surgery By S. Das.