None of those...
For me, natural ways of treating my PCOS were mainly through diet and exercise.
I do take supplements, including Vit D, Vit C, Zinc, Magnesium (chelated), Chromium (chelated), and B vitamin complex, because of my PCOS and IR. Those supplements are recommended for people who have IR and diabetes because usually people who have either, are low or missing those. No one knows yet if the diseases causes those levels to go down or if the levels being down is what help the disease to develop.
I also believe in green tea (supplements or actual tea) to help with IR because that's another one that's been found to be beneficial, but I think for me, it nets out because I drink coffee (which in some studies, shows to be bad for IR/diabetes).