Hello Nishant,

You need to qualify JEE mains and appear for JEE advance to get into top colleges in IIT's.

To get into Cs branch,

IIT, Bhubaneswar- 56 to 450 rank.

IIT ,Ropar-379 to 646 rank 

IIT, Delhi-16 to 31 rank

Madras-22 to 63 rank

Patna,428 to 715 rank

Karagpur, 21 to 73 rank

Tirupati,859 to 1000 rank

Guwahati,117 to 149 rank

Hyderabad,88 to 185 rank

Roorke ,77 to 108 rank

Bombay ,upto 14 rank

Goa ,764 to 866 closing rank.