The easiest method would be making the same animations structure in both sprites.
In the Object sprite create animations "red", "blue", "green" - with 3 frames in each (circles "A", "B", "C").
In the Spot sprite create the same animations also with three frames in each (squares "A", "B", "C").
Then add this event:
On Object drop
Object Is Overlapping Spot
Object Is animation playing Spot.AnimationName
Object compare frame =Spot.AnimationFrame
-> display message "Correct spot"
Else
-> display message "Wrong spot"