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
All contribute to postpaum hemorrhage, except: 
Select and explain. 
A. Epidural analgesia, B. Small for date, C. Prolonged labour, D. High multiparity
B: Small for date
Answer: B: Small for date 
Explanation: Small for date