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': 'Following are features of Mayer Rokitansky kuster Hauser syndrome except \nSelect and explain. \nA. Renal agenesis, B. Menorrhagia, C. Hemivertebrae, D. Normal breasts', 'role': 'user'}, {'content': 'Answer: B \nExplanation: MRKH syndrome is characterized by primary amenorrhea.', 'role': 'assistant'}]