Hello there,
We cannot predict your exact SC rank but we can give you an idea about the same. If your All India Rank is 1 lakh, it means you have scored around 90 percentile approximately. This is your overall percentile, while your category percentile will be around 96 approximately. It means your category rank will be around 3000 to 4700 approximately.

You can use our JEE Main rank predictor to predict your rank:

You need to input your marks and category, and you can get your results immediately.

You can use our college predictor to predict the best college for you:
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Hope this answer helps you.
Good luck!!