From LimeSurvey Manual
Random answer order (random_order)
This attribute causes LimeSurvey to ignore the existing order of answer options/subquestions, and instead it orders them randomly. It is important to note that this random order will be reordered each time the question is displayed, so if someone returns to a question, the order will probably be different from the first time they saw it. Having the answers display randomly is useful to remove the possibility of bias from answers to questions. Please note that if a question has subquestions the order of subquestions will be randomized, not the order of the answer options.
- Randomize on each page load
- Off (default)