Hello Sahana,

Hope you are doing well, As you've mentioned that your engineering ranking  in kcet 2021 is around 85000, with this rank your chances of getting cse seat in top engineering colleges are very low, But you may get seat in any good college, Wait & try for all rounds. Here are the colleges where you have good chances of getting seat through kcet:

BMS Institute of Technology and Management, Bangalore - BE Artificial Intelligence & Machine Learning

MVJ College of Engineering, Bangalore - BTech Data Science

Mysore College of Engineering and Management, Mysore - BE Computer Science & Engineering

Presidency University, Bangalore - BE Computer Science & Engineering

Government Engineering College, Ramanagara -  BE Computer Science & Engineering

Atria Institute of Technology, Bangalore - BE Computer Science & Engineering

Also you can also predict your college for KCET 2021 by following link:

All the best!

Hope this helps you