This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urinary tract, Subject name: Pathology
The most common variant of RCC is 
Select and explain. 
A. Clear cell, B. Papillary, C. Chromophobe, D. Collecting duct
A: Clear cell
Answer: A: Clear cell 
Explanation: Types of renal cell carcinomaFrequency1.Clear cell carcinoma2.Papillary renal cell carcinoma3.Chromophobe renal cell carcinoma4.Collecting duct carcinoma70-80%10-15%5%1% (Ref: Robbins 8/e p965)