This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Anatomy
[{'content': 'Appropriate material for antenatal diagnosis of genetic disorders includes all the following except : \nSelect and explain. \nA. Fetal blood, B. Amniotic fluid, C. Chorionic villi, D. Maternal urine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Prenatal genetic diagnosis can be made by Chorionic villi sampling Amniocentesis Cordocentesis Fetal blood tests -Triple test. Ref: Datta Obs 9e pg 103.', 'role': 'assistant'}]