The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following is not done for antenatal diagnosis of Down's syndrome:   (A) Amniotic fluid volume estimation   (B) Alpha-fetoprotein estimation   (C) Cordocentesis   (D) Chorionic villous biopsy
['(A) Amniotic fluid volume estimation <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Amniotic fluid volume estimation \n (B) Alpha-fetoprotein estimation \n (C) Cordocentesis \n (D) Chorionic villous biopsy <> possible answers', "  Which of the following is not done for antenatal diagnosis of Down's syndrome: <> context@"]