Matching Drop Down

Hi David, I was searching the community for a solution to this.  I found many but they seemed like a lot of work for my timeline.  I had the same situation as you - I had 9 options and they have to choose one out of two possible answers...I made a table just for aesthetics.  Essentially column 1 are my factors, and column 2 they have to select one of the two shapes, This is a pick many free form quiz option.  So I selected all the shapes in the free form, and just put a check mark beside the one that must be correct and told the user they must select all before clicking submit.  And told them to click again to deactivate.  So user does have to read instructions.  Seems to work.  Just did it this morning in 360.  I put in a one slide to show.  I know your post is a year old, but sometimes you are still plugging away looking for a solution the next time.  I also changed the look of the selected state on the buttons so the user can tell they activated it.

Edit- sorry I just realized I forgot to change the state of number 8 to green for modifiable.  But you get the gist.