Hello abhisek ,
You can submit your board exam marks but you will be not considered in ranking released by Keam as you not appeared in Keam examination.you must have to appear in Keam exam to be eligible for getting admission in colleges which gives admission according to Keam ranking or accept Keam score.
For more information about Keam counselling and cut-off you can visit https://www.google.com/amp/s/engineering.careers360.com/articles/keam-eligibility-criteria/amp
Hope this answer helps you.
Best of luck.

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