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
Genetic disorders are diagnosed at 11 weeks of pregnancy by : 
Select and explain. 
A. Chorionic villous biopsy, B. Amniocentesis, C. Endometrial biopsy, D. Placentography
A: Chorionic villous biopsy
Answer: A: Chorionic villous biopsy 
Explanation: Chorionic villous biopsy