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
True about Femur length used as fetal biometric measure is all except 
Select and explain. 
A. Femur length used for gestational age estimation has variation of 7 to 11 days in second trimester, B. Foreshortend femur length suggests evaluation for skeletal dysplasia, C. Femur length doesn't correlate well with BPD and gestational age, D. Femur length is measured excluding the epiphysis
C: Femur length doesn't correlate well with BPD and gestational age
Answer: C: Femur length doesn't correlate well with BPD and gestational age 
Explanation: Femur length correlates well with BPD and gestational age.