Correct answer for drag-and-drop based on number of items, not name of items
See attached image.
Here's what I want to do:
Allow the user to drag any number of the items circled in green to the "Detection/Input Devices" box (the drop target) without having to select specific items.
With the example shown, the correct answer for the drag-and-drop (D&D) interaction is based on the user choosing any four of the items in green. The answer is determined by the number of items in green dragged to drop target in red irrespective of the item/object name(s) on the slide.
I would need to replicate this for the other groups of same items as well.
Here's the problem:
Because the drag item—drop target matching is 1-to-1, during the D&D interaction the user has to know to select four specifically named items (but visually identical to other items) from the two dozen total that are matched to drop target. Thus, a correct answer could not be achieved until, after, hundreds of trial-and-errors.
If this is not possible with the limitations of D&D interaction is it possible to build a a D&D from scratch and add actions, variables, triggers, conditions, etc. to accomplish this?