if you are gen then it going to be very hard in iit and nit or iit.

but if you are from obc then there is a chance in course like dual course in iit , nit 

if you are a sc/st then you chance of medium for core course ..

if you a pwd then you chance of getting a core course is high...

you can appear to pvt college like srm , vit ,bit etc .they are also good colleges

I would sugggest you to use AP EAMCET college predictor tool based on this rank to check your chances given below.

AP EAM CET College Predictor tool

Good Luck!