I've recently passed 12th with 62% marks & I wish to do petrochemical engineering with the lowest cost where should I apply.

Hello Chirag, I am attaching a link that will give you all the required information about different colleges offering this branch. You can go through and decide which one you want to go to. https://www.shiksha.com/b-tech/colleges/b-tech-in-petroleum-engineering-colleges-india Best wishes to you.