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
Most common congenital anomaly of kidney 
Select and explain. 
A. Ectopic kidney, B. Renal duplication, C. Horse shoe kidney, D. Renal agenesis
C: Horse shoe kidney
Answer: C: Horse shoe kidney 
Explanation: Congenital anomalies of kidney and urinary tract is phenotypically variable and can affect the kidney(s) alone and/or the lower urinary tract. The spectrum includes more common anomalies such as vesicoureteral reflux and, rarely, more severe malformations such as bilateral renal agenesis. ref - researchgate.net