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 45 year old female presenting with dysmenor- rhoea & menorrhagia most probably has:a) DUBb) Endometriosisc) Fibroidd) Endometrial Ca \nSelect and explain. \nA. a, B. c, C. ac, D. bc', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]