input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which teeth are least involved in periodontitis?   (A) Lower incisor and lower molar   (B) Lower premolar and upper canine   (C) Upper molars and upper incisors   (D) Lower incisors and upper molars
output: ['(B) Lower premolar and upper canine <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Lower incisor and lower molar  (B) Lower premolar and upper canine  (C) Upper molars and upper incisors  (D) Lower incisors and upper molars <> possible answers', '  Which teeth are least involved in periodontitis? <> context']