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 are used in treatment for PPH except : 
Select and explain. 
A. Oxytocin, B. Carboprost, C. Ergometrine, D. Ritodrine
D: Ritodrine
Answer: D: Ritodrine 
Explanation: Ritodrine