<prompt> 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:GallstonesCalcified mesenteric nodesRenal stonesCalcified rib  <response>: 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. 