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
What is column of Bertini in kidney? 
Select and explain. 
A. Renal tumor, B. Tongue like papillary projection, C. Calculus, D. None
B: Tongue like papillary projection
Answer: B: Tongue like papillary projection 
Explanation: None