input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A layman before introduction of fluoride in prevention of dental caries knew about it as a constituent used in   (A) Pesticide   (B) Industrial use   (C) Fertilizers   (D) Irrigant
output: ['(A) Pesticide <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Pesticide  (B) Industrial use  (C) Fertilizers  (D) Irrigant <> possible answers', '  A layman before introduction of fluoride in prevention of dental caries knew about it as a constituent used in <> context']