Check the position after drag and drop

Hi all,

I am working on a memory game , which I set number of objects in positions and when user click on the start button these objects will move to another position, then the user has to drag them to their original position.
I need to check where the user drop the object, and if it in the wrong position, the object has to return to the position where the user drag it, so how I can do that?

Thanks in advance.

Hi, did you maybe figure out how to do this?