Hello Surakshit

I think you must be talking about GATE 2019 marks. If you are expecting a rank of around 800-1000 then you can forget PSU's. But wait, i know paper was bit easy this time but still you can't get a rank of 800-1000 in 78.67.

I think you can get a rank around 500-700 (may be). But considering 800 then only optiion left is to join IIT's for Mtech. You can't get IIT B or IIT D but you can get Roorke or Kanpur.