Hi

Yes you are eligible for JEE advanced examination.

This is because,

You belong to sc category and qualifying cutoff of JEE mains to be eligible for JEE advanced for sc category is 50.1760245 percentile  and you have got more than that i.e 81 percentile, so you  are definitely eligible for JEE advanced

To know the colleges in which you have chances you can go through our JEE mains college predictor the link for the same is given below

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

With the help of our college predictor you can know your chances of getting colleges on the basis of your JEE mains percentile, your home state, gender etc.

With the help of predicted colleges you can make better choice while filling your choices of colleges during your counselling

It gives you a personalized report with top college in which you have chances.

Thank you