This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': 'Most common cause of hematocolpos \nSelect and explain. \nA. Cervical atresia, B. Vaginal atresia, C. Transverse vaginal septum, D. Imperforate hymen', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Hematocolpos is collection of blood in the vagina. Which means the level of obstruction should be at or below the hymen. Cervical atresia will result In hematometra. The commonest cause is imperforate hymen followed by low transverse vaginal septum. The complications include hematometra, hematosalpinx, endometriosis and infeility.', 'role': 'assistant'}]