input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** The most effective caustic that may be used locally in the treatment of hypersensitive dentin in the molars is:   (A) Alcohol   (B) Chlorhexidine   (C) Trichloro acetic acid   (D) Silver nitrate
output: ['(D) Silver nitrate <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Alcohol  (B) Chlorhexidine  (C) Trichloro acetic acid  (D) Silver nitrate <> possible answers', '  The most effective caustic that may be used locally in the treatment of hypersensitive dentin in the molars is: <> context']