The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following is done for screening of Down's syndrome in first trimester?   (A) Beta HCG and PAPP-A   (B) Unconjugated estradiol and PAPPA   (C) AFP and Inhibin A   (D) AFP and Beta HCG
['(A) Beta HCG and PAPP-A <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Beta HCG and PAPP-A \n (B) Unconjugated estradiol and PAPPA \n (C) AFP and Inhibin A \n (D) AFP and Beta HCG <> possible answers', "  Which of the following is done for screening of Down's syndrome in first trimester? <> context@"]