This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology in Relation to Reproduction, Subject name: Gynaecology & Obstetrics
Triple test includes: 
Select and explain. 
A. Maternal AFP + HCG + Estradiol, B. Maternal AFP + HCG + PAPPA, C. Maternal AFP + PAPPA + Estradiol, D. TSH + HCG + Estradiol
A: Maternal AFP + HCG + Estradiol
Answer: A: Maternal AFP + HCG + Estradiol 
Explanation: Ans. is a, i.e. Maternal AFP + hCG + EstradiolThis is a repeat question and doesn't need explanation- actually it is estriol levels and not estradiol levels which are checked but since in options only estradiol is mentioned so we go with it.