This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pathology of Conception, Subject name: Gynaecology & Obstetrics
[{'content': 'All are done in quadruple test in downs syndrome except: \nSelect and explain. \nA. AFP, B. HCG, C. PAPP, D. inhibin-A', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ref: Dutta Textbook of Obstetrics 5th ed pg 493Explanation:Triple TestMS AFPL'nconjugated estrio! HCG 'Quadruple TestMS AFPUE3HCGInhibin-AIntegrated TestNTPAPP-AHCGDowns SyndromeIncreased Inhibin -AIncreased HCGDecreased MSAFPDecreased PAPPDecreased UE3", 'role': 'assistant'}]