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: Gynaecology & Obstetrics
Single umbilical aery is associated with all of the following except : 
Select and explain. 
A. Polyhydramnios, B. Advanced maternal age, C. Fetal growth retardation, D. Increased incidence of fetal malformation
B: Advanced maternal age
Answer: B: Advanced maternal age 
Explanation: Advanced maternal age