input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** In normal dentition, in centric occlusion, opposing contact may be expected at?   (A) Buccal slopes of lingual cusps of maxillary posterior teeth.   (B) Buccal slopes of buccal cusps of maxillary posterior teeth.   (C) Lingual slopes of lingual cusps of mandibular posterior teeth.   (D) All of the above.
output: ['(A) Buccal slopes of lingual cusps of maxillary posterior teeth. <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Buccal slopes of lingual cusps of maxillary posterior teeth.  (B) Buccal slopes of buccal cusps of maxillary posterior teeth.  (C) Lingual slopes of lingual cusps of mandibular posterior teeth.  (D) All of the above. <> possible answers', '  In normal dentition, in centric occlusion, opposing contact may be expected at? <> context']