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': 'Which of the following is not a contraindication for extra corporeal\nshockwave lithotripsy for renal calculi \nSelect and explain. \nA. Pregnancy, B. Bleeding disorder, C. Stone >2 cm, D. Stone in a calyceal diverticulum', 'role': 'user'}, {'content': 'Answer: D \nExplanation: C/I for ESWL are\nabsoulete\n\nPregnancy\nBleeding disorder\n\nRelative\n\nStone > 2cm\nCystine stone\nChildren\nObstructed stone.', 'role': 'assistant'}]