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
Amniocentesis is best diagnostic if done in....................weeks : 
Select and explain. 
A. 10-Aug, B. 14-Dec, C. 16-18, D. 20-22
C: 16-18
Answer: C: 16-18 
Explanation: 16-18