Thank you once again for your Idea.
Below is provided an updated wireframe:
This Idea is now put to vote.Jim Crawford commented
Thanks for your suggestion Sander, could I just confirm that your requirement is always for the fixed multiple choice option to always be the last option? So for example, there’s no need to fix the position of the second or third multiple choice option.
We're going to look into what changes we would need to make to support this. In the meantime, although the exact scenario you’ve described isn’t currently supported, there is the ability to create a Multiple Response question where the candidate would just need to select all of the 3 correct options to get full marks (as opposed to an additional single option combining all three). The advantage of this approach is you can opt to use partial marks, so if for example the candidate only selects 2 of the 3 correct options, they receive 67% of the available marks. Unfortunately this doesn't cater for the scenario where you might want to include a "none of the above" option though!