Win a 3TB WD Elements Desktop Hard Drive from PC Experts

These guys love riddle so you have to answer this:

There are three boxes. One contains tomatoes, one contains onions and one contains tomatoes and onions. They are all labelled but all the labels are on the wrong box.

You can ask for me to pull out one fruit from any box and then you have to put the labels in the right order.

How do you do it?

We know all labels are wrong.

• The onions & tomatoes labeled box must be either tomatoes or onions. Selecting one fruit from the onions & tomatoes labeled box will let you know which.

• 2 boxes are left so just label it by process of elimnation.

Example