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: Medicine
[{'content': 'Rokitansky kuster hauser syndrome is associated with - \nSelect and explain. \nA. Ovarian agenesis, B. Absent fallopian tube, C. Vaginal atresia, D. Bicornuate uterus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Congenital hypoplasia or absence of vagina in combination with an abnormal absent uterus is called Rokitansky lustre Hauser syndrome.\nIt is the second most common cause of primary amenorrhoea, next to turner syndrome (gonadal days.)', 'role': 'assistant'}]