The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Extra retention in abutment teeth is obtained with:   (A) Dovetail   (B) Slots, pins and grooves   (C) Outline form   (D) Increasing tooth reduction
['(B) Slots, pins and grooves <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Dovetail \n (B) Slots, pins and grooves \n (C) Outline form \n (D) Increasing tooth reduction <> possible answers', '  Extra retention in abutment teeth is obtained with: <> context@']