The following are multiple choice questions (with answers) about medical knowledge.   **Question:** In class III composite preparation, retention points should be placed:   (A) In the axial wall   (B) Entirely in dentine   (C) At the dentinoenamel junction   (D) At the expense of facial and lingual wall
['(B) Entirely in dentine <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) In the axial wall \n (B) Entirely in dentine \n (C) At the dentinoenamel junction \n (D) At the expense of facial and lingual wall <> possible answers', '  In class III composite preparation, retention points should be placed: <> context@']