The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Disadvantages of grids are:   (A) Skin exposure of patient   (B) Increase exposure time   (C) Doesn't improve image   (D) Overall density of radiograph is increased
['(B) Increase exposure time <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', "(A) Skin exposure of patient \n (B) Increase exposure time \n (C) Doesn't improve image \n (D) Overall density of radiograph is increased <> possible answers", '  Disadvantages of grids are: <> context@']