The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Supplementary retention on the abutment tooth is made possible by:   (A) Greater bulk of metal   (B) Proper cementation technique   (C) Shoulder preparation   (D) Proper use of pins and grooves
['(D) Proper use of pins and grooves <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Greater bulk of metal \n (B) Proper cementation technique \n (C) Shoulder preparation \n (D) Proper use of pins and grooves <> possible answers', '  Supplementary retention on the abutment tooth is made\npossible by: <> context@']