sir/mam. - I got 91.6 percentile with (S.C) as my caste in jan. attempt; can i expect nit's and which type of course in b.tech is good for me?...

You haven't mentioned the State you belong to. This is important because Candidates with Home State have lesser cut offs than Outside State Candidates. That being said, this year approximately 869010 Candidates appeared for January JEE Mains session. And you can calculate your All India Rank by using the formula:

100-your percentile*869010/100 where in 869010 is the no.of Candidates who appeared for the exam. This brings your All India Rank approximately to 72996. With this rank, the chances of NITs in top branches might be tad difficult.. If NIT is your goal, you might have to appear for April session of JEE Mains as well. You can check the previous years cut offs at our page: https://engineering.careers360.com/articles/nits-cutoff-for-top-btech-branches . Please use our College predictor for checking the Colleges that you might have chance at:

JEE Main College Predictor 2020 - Predict Colleges based on your JEE Main Rank

JEE Main College Predictor – Know your College Admission Chances Based on your Rank/Percentile, Home State, Caste, Gender, Exam Result & Get ...