This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney and ureter, Subject name: Surgery
[{'content': 'A patient presented with renal cell carcinoma invading IVC and renal vein. False statement is: \nSelect and explain. \nA. Pre-op biopsy is not necessary, B. IVC involvement indicates inoperability, C. Pre-op radiotherapy is not essential, D. Chest X-ray should be done to rule out pulmonary metastasis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Patients with renal vein or IVC involvement by tumour but without evidence of metastatic disease remain surgical candidates. Occasionally, nephrectomy and removal of IVC tumour thrombus need to be done. Bench surgery and autotransplantation is performed for larger tumours in a solitary kidney. Chest X-ray should be done to rule out pulmonary metastasis .', 'role': 'assistant'}]