This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
Blood is of fetal origin in: 
Select and explain. 
A. Placenta pre, B. Abruptio placentae, C. Vasa pre, D. Placenta accreta
C: Vasa pre
Answer: C: Vasa pre 
Explanation: Ans. C i.e. Vasa pre