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
Best time for diagnosing fetal abnormalities by USG:September 2009 
Select and explain. 
A. 6-12 weeks of pregnancy, B. 13-19 weeks of pregnancy, C. 20-26 weeks of pregnancy, D. 27-32 weeks of pregnancy
B: 13-19 weeks of pregnancy
Answer: B: 13-19 weeks of pregnancy 
Explanation: Ans. B: 13-19 weeks of pregnancy