Dropdown multiple select option

Using the dropdown type questions in a quiz it would be a good possibility to use multiple select and divide the options, for example: [select options="1,2"] and [select options="3,4,5,6"] having the [1,2,3,4,5,6] options. This seems to be working on a single question page. However, on the quiz page, I see all options [1,2,3,4,5,6] on both select boxes and not [1,2] and [3,4,5,6] as it was declared in question. Please provide a solution for that for quiz pages too!