Drag and drop on object to bounce back to it place unity c#

Hi. I am having a problem on the drag and drop game for my project. I have 3 options of answers and only 1 correct answer that can drop to the empty space (target). If the wrong answer being drop to the empty space , it will bounce back to it place. for this, i cant find the code. can someone help me please, urgent :frowning:

save object position before its starting drag and after drop,if its wrong then move this object to the position saving while drag start.