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: Physiology
In the human kidney, a renal papilla projects directly into the: 
Select and explain. 
A. Ureter, B. Major calyx, C. Minor calyx, D. Renal pyramid
C: Minor calyx
Answer: C: Minor calyx 
Explanation: None