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': 'A 50-year-old woman, nulliparous, diabetic and obese presenting with post-menopausal bleeding likely diagnosis is: \nSelect and explain. \nA. Carcinoma in situ of cervix, B. Carcinoma endometrium, C. DUB, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: A 50-year-old woman nulliparous, diabetic and obese (all predisposing factors for carcinoma endometrium) female is presenting with postmenopausal bleeding (a most common complaint in Ca endometrium).\nThe most likely diagnosis is carcinoma endometrium.', 'role': 'assistant'}]