input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following is the best study design to assess in quick time the strength of association between smoking and lung cancer?   (A) Cross-sectional study   (B) Case controlstudy   (C) Randomized controlled trial   (D) Coho study
output: ['(B) Case controlstudy <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Cross-sectional study  (B) Case controlstudy  (C) Randomized controlled trial  (D) Coho study <> possible answers', '  Which of the following is the best study design to assess in quick time the strength of association between smoking and lung cancer? <> context']