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': 'All are seen in Rokitansky Hauser syndrome except : \nSelect and explain. \nA. Absent uterus, B. Anovulation, C. Absent vagina, D. 46 XX karyotype', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Anovulation', 'role': 'assistant'}]