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
[{'content': 'Chronic pelvic pain is defined as \nSelect and explain. \nA. 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', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 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', 'role': 'assistant'}]