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: Radiology
Ultrasonogrsphy of umbilical aery is done to know about 
Select and explain. 
A. Hea beat, B. Gastational age, C. Fetalweight, D. Fetal maturity
A: Hea beat
Answer: A: Hea beat 
Explanation: A i.e. Hea beat USG of umbilical aery is done to know about hea beatQ.