Hi Hari 

if i do talk about IIT it will be a staunch difficult problem but I would like to advise you to go for some of the NITs like that of NIT Durgapur Jamshedpur Silchar Rourkela, you can also try for some of the top NITS like trichy and warangal but it will be upon your fortune so i can assure you. 

for further assistance, you can check our college rank predictor with gate marks 

https://engineering.careers360.com/gate-college-predictor

all the best