When presenting a list based question (radio button or multiple response) most of the time when you are randomising the answer options you want the last one or two answer options (Don't know, None, Not relevant etc.) to be 'anchored' to the bottom of the list.

Furthermore, if there is an other specify option, this needs to appear before these anchored options. So that it looks like this:

This is your question?
Answer 2 [Randomised]
Answer 4 [Randomised]
Answer 3 [Randomised]
Answer 1 [Randomised]
Other (specify) [Moved from last position]
None [Anchored]
Don't know [Anchored]

At the moment I am using javascript to do this (see attached), used at least 3-4 times a survey - it would be much easier if it was a feature.