The following are multiple choice questions (with answers) about medical knowledge.   **Question:** After cleaning and pumicing the tooth surface, plaque formation takes place within   (A) A few minutes   (B) 1/2 to 1 hour   (C) 2 to 4 hour   (D) After 1 hour
['(B) 1/2 to 1 hour <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) A few minutes \n (B) 1/2 to 1 hour \n (C) 2 to 4 hour \n (D) After 1 hour <> possible answers', '  After cleaning and pumicing the tooth surface, plaque formation takes place within <> context@']