This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diagnosis in Obstetrics, Subject name: Gynaecology & Obstetrics
[{'content': 'What is the risk of recurrence of anencephaly in subsequent pregnancy? \nSelect and explain. \nA. 1%, B. 2%, C. 3%, D. 4%', 'role': 'user'}, {'content': "Answer: B \nExplanation: ns. is 'b' i.e., 2% Anencephalyo The incidence of anencephalv is 1 in 1000 pregnancies.o About 70% of anencephalic fetuses are females.o The risk of recurrence of anencephalv in subsequent pres nancy is 2%.o Folic acid supplementation has reduced the incidence of neural tube defects by 85%.o Folic acid supplementation is given beginning 1 month before conception to about to about 12 weeks of pregnancy. A dose of 4mg daily is recommended.", 'role': 'assistant'}]