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
The renal cell carcinoma having worst prognosis is 
Select and explain. 
A. Clear cell carcinoma, B. Chromophobe type RCC, C. Collecting duct RCC, D. Papillary RCC
B: Chromophobe type RCC
Answer: B: Chromophobe type RCC 
Explanation: Collecting duct/ bellini has the worst prognosis.