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': 'Organism commonly causing sterility in pelvic Inflammatory disease is : \nSelect and explain. \nA. Gonococcus, B. Streptococcus, C. Staphylococcus, D. Hemophilus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Gonococcus', 'role': 'assistant'}]