Hii saurav,

The eligibility criteria of JEE Main 2019 does not specify any pass percentage for appearing in the exam. This is because the exam is also an eligibility test for admissions to B.Tech or B.E programmes in states like Madhya Pradesh, Odisha, Nagaland, Haryana, Uttarakhand, Punjab, Chandigarh etc and the percentage required by students in class XII varies from state to state.

At 49.2 percentage it will be qiut difficult to get a NIT.

but you can check your estimated rank according to your category and PWD quota ,using given link-

                 https://engineering.careers360.com/jee-main-rank-predictor.

then after you can predict the college you can get at this rank by using given link-

               https://engineering.careers360.com/jee-main-college-predictor

then you can get your answer.

hope you understand

thank you