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
All of the following are TRUE about hCG EXCEPT 
Select and explain. 
A. Has luteotrophic action, B. Acts on the same receptors as LH, C. Secreted by cytotrophoblast, D. It is a glycoprotein
C: Secreted by cytotrophoblast
Answer: C: Secreted by cytotrophoblast 
Explanation: hCG is a glycoprotein that is produced by the syncytiotrophoblast. It has Alpha and Beta subunits hCG-a HCG is identical to the a subunit of LH, FSH, and TSH. hCG is primarily luteinizing and luteotropic and has little FSH activity. It can be detected in the blood as early as 6 days after conception. It appears to act on the same receptor as LH.