The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Centre of rotation during intrusion is at:   (A) Infinity   (B) Middle third of tooth   (C) CEJ   (D) Outside the tooth
['(D) Outside the tooth <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Infinity \n (B) Middle third of tooth \n (C) CEJ \n (D) Outside the tooth <> possible answers', '  Centre of rotation during intrusion is at: <> context@']