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 treatment of choice in renal cell carcinoma with the tumor of less than 4 cm in size is - 
Select and explain. 
A. Partial nephrectomy, B. Radical nephrectomy, C. Radical nephrectomy + post operative radiotherapy, D. Radical nephrectomy + chemotherapy
A: Partial nephrectomy
Answer: A: Partial nephrectomy 
Explanation: None