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': "Following is true about Wilm's tumor, except: \nSelect and explain. \nA. May present with an abdominal lump, B. It is most common renal neoplasm in children, C. It is always unilateral, D. Responds well to chemotherapy", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. (c) It is always unilateralRef: Campbell Urology 11th Edition, Page 3568* Wilm's Tumor presents with both unilateral and bilateral tumor.", 'role': 'assistant'}]