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': 'Heamatocolpos is seen in: September 2005 \nSelect and explain. \nA. Septate uterus, B. Bicornuate uterus, C. Unicornuate uterus, D. Imperforate hymen', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D: Imperforate Hymen Hematocolpos is a medical condition in which the vagina fills with menstrual blood. It is often caused by the combination of menstruation with an imperforate hymen. A related disorder is Hematometria, where the uterus fills with (menstrual) blood. This can be caused by a congenital stenosis of the cervix, or by a complication of a surgical treatment,', 'role': 'assistant'}]