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
Mirena is: 
Select and explain. 
A. Used in abortions, B. Antiprogesterone, C. Progesterone IUCD, D. Hormonal implant
C: Progesterone IUCD
Answer: C: Progesterone IUCD 
Explanation: None