Hello Aryan,
If you want admission in the IIT Delhi
Firstly you have to qualify the jee main examination and then you have to be merit ranker in the jee advanced examination.
As you are SC reservation. Your rank should be below 100 to grab a seat in the IIT Delhi CSE
You can check the total department Rank cut off here
https://engineering.careers360.com/articles/jee-advanced-cutoff-for-iit-delhi/amp
All the best

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