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': 'First investigation to be done for post menopausal bleeding : \nSelect and explain. \nA. Endometrial biopsy, B. Dilatation and Currettage, C. Fractional currettage, D. Hysterosalpingography', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Endometrial biopsy', 'role': 'assistant'}]