Dear aspirant,

It's very difficult to give an overview on general ranks vs sc ranks because the dynamics gets changed every year on the basis of certain factors.

It depends on like number of candidates appearing in the examination, number of vacant seats in college, previous years cut offs and difficulty level of the paper.

But as per my knowledge a score of 140-150+ in jee advanced will give you top branches in the top nits for sc category.

For more information you can check out the link given below-

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer