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
Best parameter for ultrasound evaluation of IUGR is: 
Select and explain. 
A. Placental membrane, B. Length of femur, C. Abdominal circumference, D. BPD
C: Abdominal circumference
Answer: C: Abdominal circumference 
Explanation: “Abdominal circumfernece (AC) is the single most sensitive parameter to detect IUGR. Serial measurements of AC and estimations of fetal weight are more diagnostic to fetal growth restriction.”
Dutta 7/e, p 463
“The biometric parameters, AC is most affected by fetal growth”
Williams 24/e, p 199