The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A pregnant female, 38 years old, had a child with Down's syndrome. How do you assess the risk of Down's syndrome in the present pregnancy:   (A) Material alpha-feto protein   (B) Material HCG   (C) USG   (D) Chorionic villous biopsy
['(D) Chorionic villous biopsy <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Material alpha-feto protein \n (B) Material HCG \n (C) USG \n (D) Chorionic villous biopsy <> possible answers', "  A pregnant female, 38 years old, had a child with Down's syndrome. How do you assess the risk of Down's syndrome in the present pregnancy: <> context@"]