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: Medicine
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: None