The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Step back technique is consist of:   (A) 2 phases.   (B) 3 phases.   (C) 4 phases.   (D) None.
['(A) 2 phases. <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) 2 phases. \n (B) 3 phases. \n (C) 4 phases. \n (D) None. <> possible answers', '  Step back technique is consist of: <> context@']