Hi Athul,

With77 percentile, you would not be able to qualify JEE Mains if you are from general category because the cut off for general category is somewhere between 90-95. So, you would not be able to get admission in NITs, IITs, IIITs or GFTIs. My advice to you would be to appear in the entrance exam of other colleges also such as SRMJEE, MHT-CET, VITEEE, WBJEE, JEECE, etc.

However, if you are from SC category, things change a little. As your percentile score is 77 in jee mains from sc category, you are qualified in jee mains exam.
But with this much percentile, there is no chance for you to get nits or any iiits.
Because your rank is very much behind and for getting a seat in nit you must secure a minimum of 5000 to 6000 rank.

If you belong from home state quota then there is a chance that you can get seat on some low nits like, nit mizoram, etc. during csab round counseling.
But if you belong from other state you have no chance of getting nit or iiit (even at csab). But you should better try at hbtu Kanpur or some other private institutions like kalinga institute of industrial technology or cv Raman global university.

Also check out our jee mains college predictor tool to get an appropriate idea of colleges that you can get on basis of you jee mains rank :-

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer