Hello Akash Sharma

Last year the last closing rank of st category was around 510 which is too less than yours so you can't get admission there and I don't think that you can get admission into any iit.

So better you take a drop of a year and then again jee advanced if you will be focussed you will definitely get good iit.

You may have a look at jee advanced college predictor.

https://engineering-careers360-com.cdn.ampproject.org/v/s/engineering.careers360.com/articles/jee-advanced-college-predictor/amp?usqp=mq331AQLmAGi9Yr-_aWnvhs%3D&amp_js_v=a2&amp_gsa=1#referrer=https%3A%2F%2Fwww.google.com&ampshare=https%3A%2F%2Fengineering.careers360.com%2Farticles%2Fjee-advanced-college-predictor