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': 'The presentation of Asherman syndrome typically involves: \nSelect and explain. \nA. Hypomenorrhea, B. Oligomenorrhea, C. Menorrhagia, D. Metrorrhagia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A: hypomenorrhea', 'role': 'assistant'}]