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
[{'content': '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 - \nSelect and explain. \nA. Gallstones, B. Calcified mesenteric nodes, C. Renal stones, D. Calcified rib', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Renal stone", 'role': 'assistant'}]