Hello aspirant,

You got a good rank in SC category.... congratulations for that .....

preparatory ranks are not real ranks, these are the ranks that have been given for vacant seats in IITs , to tutor the candidate for a year and based on that examination in the next year, your seat will be confirmed....

Here are some good IITs after preparatory courses.....

1. IIT Bombay

2. IIT Delhi

3. IIT Hyderabad

4. IIT Kharagpur

5. IIT Roorkee

6. IIT Bhubaneshwar

7. IIT Guwahati

8. IIT mandi

9. IIT Patna

9. IIT Madras

To know better...you can predict all IIT colleges in which you have chances to get a seat according to your JEE Advanced rank category and state....

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

Hope this helps

All the best for your Future !