This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gynaecological oncology, Subject name: Gynaecology & Obstetrics
[{'content': 'The risk of complex hyperplasia of endometrium with atypia progressing to malignancy in a postmenopausal woman is : \nSelect and explain. \nA. 3%, B. 8%, C. 15%, D. 29%', 'role': 'user'}, {'content': 'Answer: D \nExplanation: WHO classification of Progression to Carcinoma The risk of complex hyperplasia of endometrium with atypia progressing to malignancy in a postmenopausal woman is 29% Reference : Textbook of Gynaecology; Sheila balakrishnan; 2nd edition; pg no: 248', 'role': 'assistant'}]