Hi Bijoy

For admission in NITs(National Institute of Technology), you need to qualify JEE mains. Along with it you need to fulfill the the criteria for board marks as well. Since you are from a board other than CBSE and considering the PwD category, you must be amongst the top 20 percentile holders in your category. Apparently, as per the trends, it is improbable that you fulfill that criteria, but since the cut offs vary every year, nothing can be said certainly. Keep your hopes high!!

I hope this helps. All the best!!