I want ask that the percentile shown is category wise or not?? I get 97.8341334 . what are branches or top nits do I get?

Bro I dont know whether you are from Sc or St(please let me know in comment)
I too got 97. 95 percentile in Jan mains this year and I'm expecting to perform much better and the April mains.

I would like to acquaint you with the knowledge that your percentile is not category wise . Your All India rank will be determined from this . And then you will also get Category rank accordingly from this .

According to your information, it seems your rank would be around 23000 . This is a decent rank but it would not help you to get a very good branch in Top NIT . But you may get Civil , Chemical and Electrical Engineering and Electrical and Electronics Engineering in NIT Surat NIT Surathkal ,NIT Kurukshetra , NIT Jamshedpur , NIT JALANDHAR and many more. You may get IT in IIEST Shibpur .