This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
[{'content': 'Percentage of complete moles progressing to persistent GTN: \nSelect and explain. \nA. 1-4 %, B. 4-8%, C. 8-12%, D. 15-20%', 'role': 'user'}, {'content': 'Answer: D \nExplanation: <p> About 15-20% of complete moles progress to persistent GTN Reference:DC Dutta&;s textbook of obstetrics,8th edition,page no:231 <\\p>', 'role': 'assistant'}]