The following are multiple choice questions (with answers) about medical knowledge.   **Question:** The classification is given by:   (A) Ackerman   (B) Proffit   (C) Dewey   (D) Both 1 and 2
['(D) Both 1 and 2 <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Ackerman \n (B) Proffit \n (C) Dewey \n (D) Both 1 and 2 <> possible answers', '  The classification is given by: <> context@']