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': 'Amenorrhoea due to high LH and FSH is due to : \nSelect and explain. \nA. Asherman syndrome, B. Pituitary adenoma, C. Ovarian failure, D. All', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ovarian failure', 'role': 'assistant'}]