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
The finding of a single umbilical artery on ultrasound is 
Select and explain. 
A. An Indicator of considerably increased incidence of major malformations in the fetus, B. Occurs in 10% of newborns, C. Insignificant, D. Equally common in newborn of diabetic and nondiabetic mothers
A: An Indicator of considerably increased incidence of major malformations in the fetus
Answer: A: An Indicator of considerably increased incidence of major malformations in the fetus 
Explanation: The presence of a single umbilical artery may be associated with congenital malformations.