This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of menstruation, Subject name: Gynaecology & Obstetrics
Chronic pelvic pain is defined as 
Select and explain. 
A. Pain of greater than 1 month, B. Pain of greater than 3 months, C. Pain of greater than 6 months, D. Pain of greater than 12 months
C: Pain of greater than 6 months
Answer: C: Pain of greater than 6 months 
Explanation: Chronic pelvic pain is defined as pain of greater than 6 months in duration, localized to the anatomic pelvis, and severe enough to cause functional disability or necessitating medical care