input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Bacteria are populated most commonly on   (A) Buccal surface   (B) Lingual surface   (C) Interproximal surface   (D) Occlusal surface
output: ['(C) Interproximal surface <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Buccal surface  (B) Lingual surface  (C) Interproximal surface  (D) Occlusal surface <> possible answers', '  Bacteria are populated most commonly on <> context']