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
[{'content': '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: \nSelect and explain. \nA. Gallstones, B. Calcified mesenteric nodes, C. Renal stones, D. Calcified rib', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 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.', 'role': 'assistant'}]