There are various good colleges to study at UG level
IITs and BITs pilani and NITs and IIITs are premium options to join
IITs like Bombay,Madras,Delhi,kanpur,Rorkee,Kharagpur and others are world class institutes to joins.
IIIT Hyderabad a d BITs pilani ,NIT Trichy,Warangal,Suratkal are other premium options and Then More IITs and NITs are there there which are exceptionally good to study.
Except BITS which conducts it's own exam
You can get admission in IITs on basis of Jee advanced and Other colleges like NITs ,IIITs a d GFTIs through JEE mains.
I hope it helps.
There are various Government Educational Institution which are good in there Computer Science UG degree like IIT , IIIT Hyderabad , BITS Pilani etc based upon your scored marks you can be able to take admission into these colleges for which you have to score the top rank in the Nationalized entrance exam such as JEE mains and Advanced entrance exam .
All the best