Validation to select multiple option in multi select

There are four option, which will generate the roster after selection.
1st Option
2nd option
3rd option
4th option

Now need a validation if the user select 2nd option without selecting 1st option , so as 3rd option without selecting 1st or 2nd option . so how can validated the missing option. so that option must be selected from first option to others options.

Binod, see the discussion here:


Best, Sergiy