Your KEAM ranks suggest range of 26000 to 27000, and hence chances for government colleges are none.

So is with Jee Mains since, cutoff is above 250.

Even with NATA, top Government colleges require 150 plus scores.

Hence you can get private architecture colleges like ICL Institute of architecture Amabala, Panjab University, DIT Dehradun, Faculty of Architecture Vadodara  MgM Navi Mumbai