Hello Aspirant

I appreciate that you ask this question but unfortunately the recognized authority doesn't reveal any data like this which contains highest score scored by a SC candidate, they only reveal overall highest score and the highest score in JEE 2019 is 346 marks scored by Kartikey Gupta

There's no information about category wise highest scorer in their official website but yes if you want to know overall cutoffs for SC candidate and it's syllabus then you can visit the following link:-

https://engineering.careers360.com/articles/jee-main-cutoff

I hope this information would be helpful for you.

All the best for your bright future ahead.