input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Streptococcus mutans is considered to be a principal etiologic agent of caries because it produces organic acids and it:   (A) Forms a gelatinous matrix   (B) bMetabolizes substrate from saliva   (C) Derives energy from enamel constituents   (D) Lives symbiotically with lactobacillus
output: ['(A) Forms a gelatinous matrix <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Forms a gelatinous matrix  (B) bMetabolizes substrate from saliva  (C) Derives energy from enamel constituents  (D) Lives symbiotically with lactobacillus <> possible answers', '  Streptococcus mutans is considered to be a principal etiologic agent of caries because it produces organic acids and it: <> context']