input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** In a coho study, to study association between factor and disease, the risk ratio was calculated to be equal to 1. What does this signifies?   (A) There is no association present between the factor and the disease   (B) There is positive association between the factor and the disease   (C) There is negative association between the factor and the disease   (D) Data insufficient to comment
output: ['(A) There is no association present between the factor and the disease <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) There is no association present between the factor and the disease  (B) There is positive association between the factor and the disease  (C) There is negative association between the factor and the disease  (D) Data insufficient to comment <> possible answers', '  In a coho study, to study association between factor and disease, the risk ratio was calculated to be equal to 1. What does this signifies? <> context']