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': 'Characteristic features of Rokitansky - Kuster Hauser syndrome are all of the following except: \nSelect and explain. \nA. Absent uterus, B. Absent vagina, C. Anovulation, D. 46 - XX', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]