You have to be under top 50 ,and for that you have to study very hard and very smartly also.And when you went to top batch you will found students of very high level ,they solve irodov for phy and very high level questions of every subjects.And one thing you have to make clear that you basics are very very strong,hc verma should be by heart and your concentration level must be very high.

BEST OF LUCK FOR YOUR FUTURE AND KEEP SMILING

As you have not mentioned your class .

Class 11-JAA1

Class 12 - JPP1

Class 13 - JRRJ1

These are the top batches of different classes . There are 3 ways to study in these batches

Method 1

You have to score above 95%ile in your CT and PT . ( NOTE- its %ile not %. You should score 70% in your test). Try to get rank in top 200. It's not obvious that top batch is very good . Sometimes faculty in 2nd and third batch teach better than top batch.