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: Radiology
[{'content': 'Anencephaly can be diagnosed by USG at – \nSelect and explain. \nA. 10–12 weeks of gestation, B. 14–18 weeks of gestation, C. 20–24 weeks of gestation, D. 24–28 weeks of gestation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Anencephaly can be detected as early as 10-11 weeks of pregnancy.', 'role': 'assistant'}]