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': 'The Histological subtype of renal cell carcinoma having worst prognosis is \nSelect and explain. \nA. Clear cell carcinoma, B. Chromophobe type RCC, C. Collecting duct RCC, D. Papillary Rcc', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer- C. Collecting duct RCCCollecting duct & Medullary- poor prognosis', 'role': 'assistant'}]