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 highest incidence of Gestational Tropho-blastic Disease is in: \nSelect and explain. \nA. Australia, B. Asia, C. North America, D. Western Europe', 'role': 'user'}, {'content': 'Answer: B \nExplanation: “Incidence of gestational trophoblastic disease varies widely with figures as high as 1 in 120 in some areas of Asia and South America, compared to 1 in 1200 in the united states.”\nDevita 7/e, p 1360', 'role': 'assistant'}]