This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Obstetrics, Subject name: Gynaecology & Obstetrics
Ba test is:- 
Select and explain. 
A. HCG + AFP + Placental alk.Phosphatase, B. AFP + Uric acid + LDH, C. HCG + AFP + Unconjugated Estriol, D. HCG + AFP + PAPP-A
C: HCG + AFP + Unconjugated Estriol
Answer: C: HCG + AFP + Unconjugated Estriol 
Explanation: Ba test is also known as Triple marker test It is combined biochemical test which includes MSAFP , hCG & UE3. In an affected pregnancy , level of MSAFP and UE3 tend to be low while hCG is high