This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: congenital anomalies of kidney, Subject name: Pediatrics
Unilateral renal agenesis is associated with: 
Select and explain. 
A. Polycystic disease of pancreas, B. Hiatus Hernia, C. Single umbilical aery, D. Hypogonadism
C: Single umbilical aery
Answer: C: Single umbilical aery 
Explanation: Malformations associated with unilateral renal agenesis are: Single umbilical aery Contralateral vesicoureteric reflux Absent ureter Absent ipsilateral vas deferens.