input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** An asymptomatic tooth has deep caries on occlusal surface. Radiograph shows radiopaque mass at apex of the tooth; this mass is most likely to be:   (A) Cementoma   (B) Condensing osteitis   (C) Chronic apical periodontitis   (D) Acute apical periodontitis
output: ['(B) Condensing osteitis <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Cementoma  (B) Condensing osteitis  (C) Chronic apical periodontitis  (D) Acute apical periodontitis <> possible answers', '  An asymptomatic tooth has deep caries on occlusal surface. Radiograph shows radiopaque mass at apex of the tooth; this mass is most likely to be: <> context']