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: Gynaecology & Obstetrics
Schwangershaft protein is the other name of: 
Select and explain. 
A. hCG, B. Papp-1, C. Pregnancy specific beta1 glycoprotein, D. Activin
C: Pregnancy specific beta1 glycoprotein
Answer: C: Pregnancy specific beta1 glycoprotein 
Explanation: This protein appears as early as three days following feilisation in maternal blood and is developed as a test for early detection and monitoring of pregnancy.