The following are multiple choice questions (with answers) about medical knowledge.   **Question:** The following appliance is used in:   (A) Space regaining   (B) Maxillary arch expansion   (C) Distalization of molar   (D) None of the above
['(B) Maxillary arch expansion <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Space regaining \n (B) Maxillary arch expansion \n (C) Distalization of molar \n (D) None of the above <> possible answers', '  The following appliance is used in: <> context@']