Hello Bhoomika,

Well I am sorry to say but you are not eligible for admission in IISc as because IISc takes admission through JEE Advance. With your JEE Mains rank you can get admission in NITs,IIITs and GFITs but for IISc you need to have cleared JEE Advance. Now to get admission through your mains score you need to first clear the cutoff for JEE Mains as per your category. Below I have listed 2019 JEE Mains cutoff (percentile) category wise - 

• CRL : 89.75
• GEN-EWS : 78.21
• OBC-NCL : 74.31
• SC : 54.01
• ST : 44.33
• PwD : 0.11

So, if you have cleared the cutoff as  per your category then you are eligible to apply for colleges through JEE Mains score. To apply for colleges that come under JEE Mains you have to attend JoSAA counselling.

You can go through this link and checkout the details regarding JoSAA counselling : https://engineering.careers360.com/articles/josaa-counselling

Hope that you get your choice of college and branch. Good Luck !!!