The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Patient's cross infection with bite block of orthopantamograph machine is prevented by   (A) Cover with autoclaved cloth with each use   (B) Using disposable bite blocks   (C) Clean with 5.25% sodium hypochlorite in each patient   (D) Cover with impervious barrier
['(B) Using disposable bite blocks <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Cover with autoclaved cloth with each use \n (B) Using disposable bite blocks \n (C) Clean with 5.25% sodium hypochlorite in each patient \n (D) Cover with impervious barrier <> possible answers', "  Patient's cross infection with bite block of orthopantamograph machine is prevented by <> context@"]