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
Fetal blood loss occurs in : 
Select and explain. 
A. Uterine rupture, B. Placenta pre, C. Vasa pre, D. Circumvallate
C: Vasa pre
Answer: C: Vasa pre 
Explanation: Vasa pre