In order to take admission in IITs, NITs, IIITs as a general category you should have minimum 75% aggregate score in Physics, Chemistry & Mathematics in class 12th or you should be in the top 20 percentile & 65% as SC, ST category. You can check the further eligibility with the given below link.

https://engineering.careers360.com/articles/jee-main-eligibility-criteria

Good Luck!

Hii

In order to get admission in NIT Patna, you need to qualify JEE Mains. Without qualifying this exam you can't get admission in NIT Patna. You can give JEE Mains in 2019. You will get 2 chances to write JEE Mains.

To Know about JEE Main 2019 – Preparation Tips, Important Topics & Books, Click below link-

https://engineering.careers360.com/articles/jee-main-2019

All the best.