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: Radiology
[{'content': 'A patient has calcification on AP view of right side of abdomen. In lateral view, calcification is seen to overlie the spine. The most likely diagnosis is: \nSelect and explain. \nA. Gall stone, B. Calcified mesenteric nodes, C. Renal stones, D. Calcification in veebral sphenoid process', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Renal stones', 'role': 'assistant'}]