The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Mechanical objectives of cleaning ans shaping are given by:   (A) Schilder   (B) Wein   (C) Brook   (D) Grossman
['(A) Schilder <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Schilder \n (B) Wein \n (C) Brook \n (D) Grossman <> possible answers', '  Mechanical objectives of cleaning ans shaping are given by: <> context@']