I am a JEE mains aspirant but was not able to fulfill the eligibility criteria of 75%(for general category) in 12th exam from CBSE board for admission in NITs/IIITs/GFTIs through JEE mains in year 2018. Next year in 2019 I appeared in improvement exam but again was unable to score 75% in it. Now to fulfill the eligibility criteria for admission in above mentioned institutions if I appear in state board examination in 2020 then would it be legal step for future admission purposes