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 causes of amenorrhoea EXCEPT : \nSelect and explain. \nA. Pituitary adenoma, B. Chronic nephritis, C. Tubercular endometritis, D. Adenomyosis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Adenomyosis', 'role': 'assistant'}]