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
['(B) Case controlstudy <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Cross-sectional study \n (B) Case controlstudy \n (C) Randomized controlled trial \n (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@']