This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Anatomy
Modified BPS consists of : 
Select and explain. 
A. NST with AFI, B. NST with fetal breathing, C. NST with fetal movement, D. NST with fetal tone
A: NST with AFI
Answer: A: NST with AFI 
Explanation: Modified biophysical score consists of NST or vibroacoustic non stress test and estimation of amniotic fluid volume using AFI. It takes 10 minutes to perform the score and is used as screening test. Ref: Williams Obs 24e pg 342-344.