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: Pediatrics
Unilateral renal agenesis is associated with – 
Select and explain. 
A. Polycystic disease of pancreas, B. Hiatus Hernia, C. Single umbilical artery, D. Hypogonadism
C: Single umbilical artery
Answer: C: Single umbilical artery 
Explanation: Malformations associated with unilateral renal agenesis

Single umbilical artery               
Absent ureter        
Controlateral vesicoureteric reflux
Absent Ipsilateral vas defrens                        

Bilateral renal agenesis

It is incompatible with extrauterine life, death occurs shortly after birth from pulmonary hypoplasia.
It is also known as Potter syndrome.