I passed Cbse board in 2018 but scored low percentage in Class 12 then I addmission in Up board and pass 2020.I have 2 marksheet class 12.I confusion which marksheet I will use.
Obviously you will use the UP Board result if its better or else you will have to go with the CBSE Board marksheet. You cant do it with both of them but you have to choose the marksheet which have better marks as it will provide you a better opportunity.
I hope this answer helps. All the very best for your future endeavors!