In order to be eligible for this college you should have aggregrate 45% marks in your boards exam.

No, you are not eligible for the same as you must have filled either of any criteria mentioned below -

(i) The candidate is within the category-wise top 20 percentile of successful candidates in
their respective Class XII (or equivalent) examination of respective stream and Board.
(ii) The candidate has secured minimum 75% (for GEN or OBC-NCL) or a minimum 65 %
(for SC, ST or PwD) of aggregate marks in the Class XII (or equivalent) examination of
respective stream and Board.

Hope this helps!!!