Hello,

Arrears means backlog. You had three backlog in your engineering course and you didn't clear it till now. So you are getting admission in 2015 because you mentioned passout year 2019. You give 12th in 2015. Which is too long for appearing JEE Mains examination for engineering entrance. You will give the examination for joining new college from 1st year. So you have to give entrance examination. JEE Mains examination is cancel out for you. But you can give state entrance examination, you didn't mention above which state you are belongs. So every state conduct entrance examination for engineering, pharmacy colleges. You can give this examination. Otherwise some private engineering college or Universities are offered their own entrance examination or direct examination from your 12th marks. You can check this college. So you can get admission from the beginning of engineering. But this time you have to study hard and do your best. And full covered and pass the 4 years BTech degree.

All the best.