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
Anencephaly can be diagnosed by ultrasound at: 
Select and explain. 
A. 14-18 week of gestation, B. 20-24 week of gestation, C. 24-37 weeks of gestation, D. 10-12 week of gestation
D: 10-12 week of gestation
Answer: D: 10-12 week of gestation 
Explanation: 10-12 week of gestation