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': 'Post - Menopausal bleeding is associated with all except : \nSelect and explain. \nA. Ca cervix, B. CIN, C. Ca ovary, D. Endometrial Ca', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is b i.e. CIN', 'role': 'assistant'}]