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 for cervical ripening, except : 
Select and explain. 
A. Ergometrine, B. Oxytocin, C. Stripping of membranes, D. Prostaglandins
A: Ergometrine
Answer: A: Ergometrine 
Explanation: Ergometrine