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
Bandl's ring is also called as: 
Select and explain. 
A. Constriction ring, B. Schroeder's ring, C. Retraction ring, D. Cervical dystocia
C: Retraction ring
Answer: C: Retraction ring 
Explanation: None