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 risk of endometrial cancer is highest with the following histological pattern of endometrial hyperplasia: \nSelect and explain. \nA. Simple hyperplasia without atypia, B. Simple hyperplasia with atypia, C. Complex hyperplasia without atypia, D. Complex hyperplasia with atypia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]