This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen and pelvis, Subject name: Anatomy
Which of the following is not a content of renal sinus ? 
Select and explain. 
A. Branches of renal aery, B. The renal pelvis, C. Renal tubule, D. Tributeries of renal vein
C: Renal tubule
Answer: C: Renal tubule 
Explanation: he renal sinus is a space that extends into the kidney from the hilus. It contains - (a) branches of the renal aery; (b) tributaries of the renal vein; and (c) the renal pelvis. Ref : B D Chaurasia's Human Anatomy , seventh edition , volume 2 , pg. no., 344.