Dear aspirant !

Hope you are doing great ! This is a serious problem ,from my point of view if you will do class 12 from nios there will be also problem but if this is the last option then you have to do ,but try to download your certificate from digilocker app ,it is also valid in all over India ,it is verified app available on playstore ,try this method before again doing class 12th from nios ,if this doesn't work then only go for class 12 again nios.

Hope it helps you !!

Thank you !!