If you are using the swap animationFrame/animation method instead of setting to a specific frame use the "choose" expression e.g. set animation to choose("A","B","C") or set animationFrame to (0,1,2,3).
If you are spawning a new object you'll need to use a local variable:
On object clicked set local variable to choose(0,1,2,3)
If local variable = 0 spawn object A
If local variable = 1 spawn object B