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
[{'content': 'Most comon cause of pelvic inflammatory disease in virgin girls is : \nSelect and explain. \nA. Gonorrhoea, B. Chlamydia, C. Treponema pallidum, D. Tubercular', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Tubercular', 'role': 'assistant'}]