There are three boxes: one contains only apples, one contains only oranges, and one contains both apples and oranges. Each box is labeled incorrectly. If you can only pick one fruit from one box, how can you correctly label all the boxes?
Answer: A. Pick from the box labeled 'apples and oranges'
Picking from the box labeled 'apples and oranges' will reveal the true contents, allowing for correct labeling.