This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Intra Uterine Growth Restriction, Intrapaum and Antepaum Fetal Surviellance, Subject name: Gynaecology & Obstetrics
If the fetus has Down syndrome,quadruple marker will not show : 
Select and explain. 
A. High hCG, B. Low Inhibin A, C. Low AFP, D. Low Estriol
B: Low Inhibin A
Answer: B: Low Inhibin A 
Explanation: Aneuploidies AFP Estriol hCG Inhibin A Down's Syndrome Low Low High High