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
The most common complication of IUCD is : 
Select and explain. 
A. Ectopic pregnancy, B. Bleeding, C. Backache, D. Cervical stenosis
B: Bleeding
Answer: B: Bleeding 
Explanation: Bleeding