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': 'Oral contraceptive pills decrease incidence of all of the following conditions except : \nSelect and explain. \nA. Salpingitis, B. Hepatic adenoma, C. Ovary CA, D. Fibroadenosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Hepatic adenoma', 'role': 'assistant'}]