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Based on what you have mentioned, I do believe that you mean the options in the dropdown fields.
If that is true, then it would not be possible to set up the options.
Basically the dropdown is there to either specify if you are checking the specific value (yes) or leaving it unchecked (nothing selected or No selected).
There is no way to change the Yes and No in the same.
Do of course let us know if that is not what you meant.