With 90 marks in JEE Advanced under SC category tab, you can expect to get a rank around 1500. Even the rank can uprise seeing the experts view that the exam was a bit more difficult in comparison to last year so with a little lower marks you can expect a better rank in comparison to last year. If you are able to secure a rank in 1500 then you can definitely get a seat in one of the IITs. And better the rank better will be the branch and IIT for you.

Feel free to ask if you have any more queries. All the best!!

there are light chances only

anyway give a try 

all the best

hope for the best