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
Which of the following is the most common renal vascular anomaly? 
Select and explain. 
A. Supernumerary renal aeries, B. Supernumerary renal veins, C. Double Renal aerires, D. Double Renal veins
A: Supernumerary renal aeries
Answer: A: Supernumerary renal aeries 
Explanation: The incidence of renovascular anomaly is as high as 40% of population. The most common variety is, 2-5 small renal aeries to the kidneys (supernumerary renal aeries). Ref: The Surgical Review: An Integrated Basic and Clinical Science Study Guide By Paige M. Porret, 3rd Edition